Sh lewis structure - Draw the Lewis structure for SH 2 F 3 ( S is central). Predict the molecular geometry and bond polarity. Draw two perspective drawings, one where the SH 2 F 3 molecule is polar and one where the SH 2 F 3 molecule is nonpolar.

 
Draw the complete Lewis structure for NO2-(the nitrite ion) showing the steps used to get the correct answers (not just the correct answer). Be sure to include formal charges and both resonance structures a.. Rhonda orr

I don't know why you have that image, but anyways, "HXeSH"... "Xe" is a noble gas which contributes 8 valence electrons to the lewis structure. "S" is group 16, which contributes 6 electrons to the lewis structure. Each "H" contributes 1 electron. So, we have a total of 16 electrons to distribute. Note that the formula could have been written … Key Questions. How can I draw a Lewis structure of a compound? Several Socratic answers give the procedure. For example, check. http://socratic.org/questions/what-is-the-lewis-structure-for-so2?source=search. http://socratic.org/questions/how-do-you-draw-the-lewis-structure-for-no?source=search. A step-by-step explanation of how to draw the NH3 Lewis Dot Structure (Ammonia).For the NH3 structure use the periodic table to find the total number of vale...When it comes to finding the perfect recliner for your home, John Lewis is a great place to start. With a wide selection of styles and sizes, you’re sure to find something that fit...Sep 16, 2012 · While Lewis structures are in general not a very accurate way to depict the molecular structure, it should be made clear, that the molecule is not linear. * It is also necessary, that the formal charges within the molecule add up to the overall charge of the ion. Hence the probably best Lewis structure is the following: A step-by-step explanation of how to draw the HS- Lewis Dot Structure.For the HS- structure use the periodic table to find the total number of valence electr...Step 3: Connect each atoms by putting an electron pair between them. Now in the CH3SH molecule, you have to put the electron pairs between the carbon (C) atom, sulfur (S) atom and hydrogen (H) atoms. This indicates that these atoms are chemically bonded with each other in a CH3SH molecule.The Lewis base is (CH 3) 2 S, and the Lewis acid is BH 3. As in the reaction shown in Equation 8.21, CO 2 accepts a pair of electrons from the O 2− ion in CaO to form the carbonate ion. The oxygen in CaO is an electron-pair donor, so CaO is the Lewis base. Carbon accepts a pair of electrons, so CO 2 is the Lewis acid.November 22, 2023 by Deep. The information on this page is fact-checked. Lewis structure of SbF 5. The Lewis structure of SbF5 contains five single bonds, with antimony in the center, and five fluorines on either side. There are three lone pairs on each fluorine atom, and the antimony atom does not have any lone pair.Draw the complete Lewis structure for NO2-(the nitrite ion) showing the steps used to get the correct answers (not just the correct answer). Be sure to include formal charges and both resonance structures a.A. Draw the major resonance structure, then draw. Consider the Lewis structure shown for thionitromethane. Draw the major resonance structure for the compound shown; include lone pairs of electrons, formal charges, and condensed hydrogen atoms (located in the More menu). Then draw curved arrows to show how this can be converted to the Lewis ...Structured interviews help get relevant and accurate info, which leads to better hires. Here’s the process and some example questions. Human Resources | How To Get Your Free Hiring...A step-by-step explanation of how to draw the CH3SH (CH4S) Lewis Dot Structure For the CH3SH structure use the periodic table to find the total number of va...John Lewis was not just a civil rights icon; he was also a remarkable leader who left a lasting impact on those around him. His dedication to justice, his unwavering commitment to ...Question: What is the correct Lewis-Dot structure for SH2? А Bi H-5-H A = S - H c. Ä - Ŝ- D. H=5=H Ос OB СА. There’s just one step to solve this. Understand that sulfur has 6 valence electrons, meaning it needs only 2 more electrons to fulfill the octet rule; also note that each hydrogen atom has only 1 electron and can therefore ...The lines indicate only the connections between atoms, not whether the bonds are single, double, or triple. (Red = O, gray = C, blue = N, ivory = H). Give the formula of thalidomide, and indicate the positions of multiple bonds and lone pairs. Write Lewis structures for the following: (a) H2CO (both H atoms are bonded to C), (b) H2O2, (c) C2F6 ...Steps. Use these steps to correctly draw the CH 2 Lewis structure: #1 First draw a rough sketch. #2 Mark lone pairs on the atoms. #3 Calculate and mark formal charges on the atoms, if required. Let’s discuss each step in more detail.The Lewis structure for a thiol ion can be drawn with sulfur as the central atom bonded to a hydrogen atom and two lone pairs on sulfur, enclosed in brackets indicating the -1 charge. Explanation: The Lewis structure for a thiol ion (SH-) can be drawn by first placing the sulfur atom at the center, as it is less electronegative than hydrogen.Follow these simple steps to draw Lewis dot structures: Draw the atoms on paper and put dots around them to represent valence electrons of the atom. Be sure to have the correct number of electrons. If the species is an ion, add or subtract electrons corresponding to the charge of the ion. Add an electron for every negative (-) charge, and ...A step-by-step explanation of how to draw the CH3SH (CH4S) Lewis Dot Structure For the CH3SH structure use the periodic table to find the total number of va...Steps to draw the lewis structure of AsH3. Step 1. Count the total number of valence shell electrons on the compound. This is done by adding the valence shell electrons of all the constituent atoms. Atom. Atomic Number. Group Number. Valenceelectrons according to group number. Electronic configuration (E.C.)The structure on the right is the Lewis electron structure, or Lewis structure, for H 2 O. With two bonding pairs and two lone pairs, the oxygen atom has now completed its octet. Moreover, by sharing a bonding pair with oxygen, each hydrogen atom now has a full valence shell of two electrons. Chemists usually indicate a bonding pair by a single ...Lewis structure: diagram showing lone pairs and bonding pairs of electrons in a molecule or an ion. Lewis symbol: symbol for an element or monatomic ion that uses a dot to represent each valence electron in the element or ion. lone pair: two (a pair of) valence electrons that are not used to form a covalent bond.Uses of sp lewis structure. To understand chemical bonding, we need to identify lone pair and bond pair electrons in a molecule. Lewis structure helps visualize the arrangement of valence shell electrons in a molecule. It helps in understanding chemical bonding. Also Read: Nh4no3 lewis structure; Ccl3f lewis structure; H2s lewis structure; Mg2 ...∴ Therefore, the total valence electrons available for drawing the Lewis dot structure of H 2 S = 2(1) + 1(6) = 8 valence electrons.. 2. Choose the central atom. By convention, the least electronegative atom out of all those available is chosen as the central atom while drawing the Lewis structure of a molecule.Draw the Lewis structure for HCO2- and determine the formal charge of each atom. Draw the Lewis structure for PBr3 and label the formal charges. Draw the Lewis structure with a formal charge N_2. Draw the Lewis structure with a formal charge SO_3. Draw a Lewis structure for SO2 in which all atoms have a formal charge of zero. 2. On your scratch paper, draw the Lewis structure for SH 2. Then answer the following questions based on your structure. a) What is the central atom in the structure? b) How many total valence electrons are in the structure? c) Using the 6N +2 rule, what type of covalent bonds are present in this structure? Step 1: Determine the total number of valence electrons. Step 2: Write the skeleton structure of the molecule. Step 3: Use two valence electrons to form each bond in the skeleton structure. Step 4: Try to satisfy the octets of the atoms by distributing the remaining valence electrons as nonbonding electrons.Lewis-dot structure of SH2 : The electronic configuration of sulphur = [Ne]3s^23p^4 The number of valence e. …. View the full answerAre you on the hunt for the best deals and sales at John Lewis UK? Look no further. In this shopper’s guide, we’ll explore the top ways to save money and find great bargains at thi...Identify the valence electrons for sulfur and hydrogen to start drawing the Lewis structure for S H 2. In your notes, draw the lewis structure for SH2. How many lone pairs and bonds are on the sulfur? Select one: O a. 1 …Write the Lewis structures of the reactants and product of each of the following equations, and identify the Lewis acid and the Lewis base in each: (a) CS 2 + SH − HCS 3 − (b) BF 3 + F − BF 4 −Feb 15, 2024 · In the above structure, you can see that the central atom (carbon) forms an octet. The outside atom (sulfur) also forms an octet, and all hydrogens form a duet. Hence, the octet rule and duet rule are satisfied. Therefore, this structure is the stable Lewis structure of CH 3 SH. Next: C 2 H 2 O Lewis structure. 📝 Your feedback matters. Visit ... Structured interviews help get relevant and accurate info, which leads to better hires. Here’s the process and some example questions. Human Resources | How To Get Your Free Hiring...Lewis Structures. We also use Lewis symbols to indicate the formation of covalent bonds, which are shown in Lewis structures, drawings that describe the bonding in molecules and polyatomic ions. For example, when two chlorine atoms form a chlorine molecule, they share one pair of electrons:Step 3: Connect each atoms by putting an electron pair between them. Now in the CH3SH molecule, you have to put the electron pairs between the carbon (C) atom, sulfur (S) atom and hydrogen (H) atoms. This indicates that these atoms are chemically bonded with each other in a CH3SH molecule. Step 1. The aim of the question is to find the Lewis structure of the compound. View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question. Transcribed image text: Convert the structure below to a Lewis structure. Solved in 3 steps with 3 images. SEE SOLUTION Check out a sample Q&A here. Solution for Draw the lewis structure for SH2. Then identify the electron pair geometry (EPG), molecular geometry (MG) bond angle (BA), and polarity (P).….The Lewis electron structure for the NH 4+ ion is as follows: The nitrogen atom shares four bonding pairs of electrons, and a neutral nitrogen atom has five valence electrons. Using Equation 4.4.1, the formal charge on the nitrogen atom is …The Lewis structure indicates that each Cl atom has three pairs of electrons that are not used in bonding (called lone pairs) and one shared pair of electrons (written between the atoms). A dash (or line) is usually used to indicate a shared pair of electrons: In the Lewis model, a single shared pair of electrons is a single bond.John Lewis is one of the UK’s leading retailers, offering a wide range of products from fashion to home furnishings. With so many products available, it can be difficult to find th...What is the Lewis structure for sh-? H-S-F. Single bonds between H and S and F. S has two pairs of valence electrons on it, and F has three pairs. This satisfies the octet rule. Source: 10th grade ...1) determine the number of valence electrons to be distributed in the Lewis structure. 2) Write the skeletal structure. 3) Place one pair of electrons between each bonded atom. 4) Place lone pairs around terminal atoms using remaining electrons. 5) Move electrons to form double or triple bonds. 6) Place remaining electrons around central atom ...Sh Lewis Structure Advanced Inorganic Chemistry - Volume I Satya Prakash et al. 2000-10 Advanced Inorganic Chemistry - Volume I is a concise book on basic concepts of inorganic chemistry. It acquaints the students with the basic principles of chemistry and further dwells into the chemistry of main group elements and their compounds.Oct 24, 2017 ... VSEPR Theory - Basic Introduction · Exceptions To The Octet Rule - Lewis Dot Diagrams · Lewis Diagrams Made Easy: How to Draw Lewis Dot Structures.Consider the Lewis structure shown for thionitromethane. Draw the major resonance structure for the compound shown; include lone pairs of electrons, formal charges, and condensed hydrogen atoms (located in the More menu). Then draw curved arrows to show how this can be converted to the Lewis structure given.A. Draw the major resonance structure ...The Lewis structure, also known as the electron dot structure, provides a visual representation of the arrangement of valence electrons around atoms in a ...Moreover, it mostly exists with organic compounds with structures like RNH- and NR2 where nitrogen is bonded with corresponding carbon atoms. In this article, we will discuss NH2- molecular geometry and Lewis structure of NH2- along with its shape, bond angle, polarity, hybridization, and other chemical and molecular properties.By using the following steps, you can easily draw the Lewis structure of SbCl 5. #1 Draw skeleton. #2 Show chemical bond. #3 Mark lone pairs. #4 Calculate formal charge and check stability (if octet is already completed on central atom) Let’s one by one discuss each step in detail.Try drawing Lewis-structures for the sulfur atoms in these compounds. If you restrict your formulas to valence shell electron octets, most of the higher oxidation states will have formal charge separation, as in equation 2 above. The formulas written here neutralize this charge separation by double bonding that expands the valence octet of sulfur.Consider the Lewis structure shown for thionitromethane. Draw the major resonance structure for the compound shown; include lone pairs of electrons, formal charges, and condensed hydrogen atoms (located in the More menu). Then draw curved arrows to show how this can be converted to the Lewis structure given.A. Draw the major resonance …Bisulfide (or bisulphide in British English) is an inorganic anion with the chemical formula HS − (also written as SH − ). It contributes no color to bisulfide salts, and its salts may have a distinctive putrid smell. It is a strong base. …If you’re in the market for a new or used car in Hays, KS, chances are you’ve come across Lewis Ford Toyota. With a reputation for quality vehicles and exceptional customer service...Lewis electron dot diagrams use dots to represent valence electrons around an atomic symbol. Lewis electron dot diagrams for ions have less (for cations) or more (for anions) dots than the corresponding atom. This page titled 9.2: Lewis Electron Dot Diagrams is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, …Try drawing Lewis-structures for the sulfur atoms in these compounds. If you restrict your formulas to valence shell electron octets, most of the higher oxidation states will have formal charge separation, as in …Draw the Lewis structure for SH 2 F 3 ( S is central). Predict the molecular geometry and bond polarity. Draw two perspective drawings, one where the SH 2 F 3 molecule is polar and one where the SH 2 F 3 molecule is nonpolar. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Determine the number of valence electrons in SH⁻ and then draw the corresponding Lewis structure. Please place the atoms of SH⁻ in the order they are written. Determine the number of valence electrons in SH ... Step 1. The aim of the question is to find the Lewis structure of the compound. View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question. Transcribed image text: Convert the structure below to a Lewis structure.Starting from this structure, complete the correct structure that follows the octet rule on all atoms. A Lewis structure for chlorate (ClO₃⁻) is shown below, however, its formal charges are not minimized. Starting from this structure, complete the correct structure that follows the octet rule on all atoms. Here’s the best way to solve it.A step-by-step explanation of how to draw the NH3 Lewis Dot Structure (Ammonia).For the NH3 structure use the periodic table to find the total number of vale...While Lewis structures are in general not a very accurate way to depict the molecular structure, it should be made clear, that the molecule is not linear. * It is also necessary, that the formal charges within the molecule add up to the overall charge of the ion. Hence the probably best Lewis structure is the following:The Lewis electron structure for the NH 4+ ion is as follows: The nitrogen atom shares four bonding pairs of electrons, and a neutral nitrogen atom has five valence electrons. Using Equation 8.5.1, the formal charge on the nitrogen atom is therefore. formal charge(N) = 5 − (0 + 8 2) = 0.A step-by-step explanation of how to draw the SiH3 - Lewis Dot Structure. We also look at the molecular geometry, bond angles, and electron geometry for SiH...SH2 Lewis structure gives information about outer most orbit electrons of the involved atoms. These electrons are responsible for chemical properties of the molecule. …3.1: Lewis Structures is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. hemical bond refers to the forces holding atoms together to form molecules and solids. This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another ….CH 3 SH (methanethiol) has one carbon atom, four hydrogen atoms, and one sulfur atom. In the CH 3 SH Lewis structure, there is a single bond between the carbon and sulfur atom. The carbon atom is … 1) determine the number of valence electrons to be distributed in the Lewis structure. 2) Write the skeletal structure. 3) Place one pair of electrons between each bonded atom. 4) Place lone pairs around terminal atoms using remaining electrons. 5) Move electrons to form double or triple bonds. 6) Place remaining electrons around central atom ... Step 1. Solution: You can follow these steps to draw the Lewis structure for a thiol ion ( SH A −): Count the valence e... View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question.∴ Therefore, the total valence electrons available for drawing the Lewis dot structure of H 2 S = 2(1) + 1(6) = 8 valence electrons.. 2. Choose the central atom. By convention, the least electronegative atom out of all those available is chosen as the central atom while drawing the Lewis structure of a molecule.XeO 2 F 2. Steps for Writing Lewis Structures. Find the total valence electrons for the molecule. Explain How Examples: H 2 S, NCl 3, OH -. Put the least electronegative atom in the center. Note: H always goes outside. Examples: NOCl, CF 2 Cl 2, HCN. Put two electrons between atoms to form a chemical bond. Examples: CH 4, NH 3, I 2.Lewis dot structures can be drawn to show the valence electrons that surround an atom itself. This type of Lewis dot structure is represented by an atomic symbol and a series of dots. See the following examples for how to draw Lewis dot structures for common atoms involved in covalent bonding. Example 1. Draw the Lewis …Jun 23, 2023 · Step 3: Connect each atoms by putting an electron pair between them. Now in the CH3SH molecule, you have to put the electron pairs between the carbon (C) atom, sulfur (S) atom and hydrogen (H) atoms. This indicates that these atoms are chemically bonded with each other in a CH3SH molecule. Lewis Structures. We also use Lewis symbols to indicate the formation of covalent bonds, which are shown in Lewis structures, drawings that describe the bonding in molecules …Sep 16, 2012 · While Lewis structures are in general not a very accurate way to depict the molecular structure, it should be made clear, that the molecule is not linear. * It is also necessary, that the formal charges within the molecule add up to the overall charge of the ion. Hence the probably best Lewis structure is the following: Step 3: Determine the Number of Bonds in the Molecule. Covalent bonds are formed when one electron from each atom forms an electron pair. Step 2 tells how many electrons are needed and Step 1 is how many electrons you have. Subtracting the number in Step 1 from the number in Step 2 gives you the number of electrons needed to …The Lewis structure for SH-, or the hydrosulfide ion, consists of a sulfur atom bonded to a hydrogen atom with two lone pairs on the sulfur and one additional electron, giving it a negative charge. This structure follows the octet rule, which states that atoms tend to form bonds in such a way that they have eight electrons in their valence ...Now that we've established Lewis Structure For Sh, it's time to dissect the Lewis Structure For Sh formats you might encounter. Chapter 2 provides a comprehensive exploration of Lewis Structure For Sh, from multiple-choice to essay-based Lewis Structure For Sh. Understanding the Lewis Structure For Sh is key to tailoring your …2024-05-11. Description. Methyl mercaptan is a colorless gas with a smell like rotten cabbage. It is a natural substance found in the blood, brain, and other tissues of people and animals. It is released from animal feces. It occurs naturally in certain foods, such as some nuts and cheese.Uses of sp lewis structure. To understand chemical bonding, we need to identify lone pair and bond pair electrons in a molecule. Lewis structure helps visualize the arrangement of valence shell electrons in a molecule. It helps in understanding chemical bonding. Also Read: Nh4no3 lewis structure; Ccl3f lewis structure; H2s lewis structure; Mg2 ...Lewis Structures. We also use Lewis symbols to indicate the formation of covalent bonds, which are shown in Lewis structures, drawings that describe the bonding in molecules and polyatomic ions. For example, when two chlorine atoms form a chlorine molecule, they share one pair of electrons:May 12, 2022 · Uses of sp lewis structure. To understand chemical bonding, we need to identify lone pair and bond pair electrons in a molecule. Lewis structure helps visualize the arrangement of valence shell electrons in a molecule. It helps in understanding chemical bonding. Also Read: Nh4no3 lewis structure; Ccl3f lewis structure; H2s lewis structure; Mg2 ... The Lewis electron structure for the NH 4+ ion is as follows: The nitrogen atom shares four bonding pairs of electrons, and a neutral nitrogen atom has five valence electrons. Using Equation 4.4.1, the formal charge on the nitrogen atom is therefore. formalcharge(N) = 5 −(0 + 8 2) = 0.Unit Objectives. Explain the formation of cations, anions, and ionic compounds. Predict the charge of common metallic and nonmetallic elements, and write … Bisulfide (or bisulphide in British English) is an inorganic anion with the chemical formula HS − (also written as SH − ). It contributes no color to bisulfide salts, and its salts may have a distinctive putrid smell. It is a strong base. Bisulfide solutions are corrosive and attack the skin.

What are the steps for making lewis structures? (4) 1.) count the total number of valence electrons in the molecule 2.) Put the least electronegative atom in the center and connect terminal atoms to it with single bonds 3.) Complete the octets for all terminal atoms except hydrogen atoms. Juice wrld ex gf

sh lewis structure

Draw complete Lewis structures for the following condensed structural formulas. (a) CH 3 ( CH 2 ) 3 CH ( CH 3 ) 2 (b) ( CH 3 ) 2 CHCH 2 Cl (c) CH 3 CH 2 COCN (d) CH 2 CHCHO (e) ( CH 3 ) 3 CCOCHCH 2 (f) CH 3 COCOOH (g) ( CH 3 CH 2 ) 2 CO (h) ( CH 3 ) 3 COH Repeat Problem 1-11, this time drawing lineangle structures for compounds (a) through …Here are the steps to draw a Lewis structure. The example is for the nitrate ion. A Lewis structure is a diagram that shows the chemical bonds between atoms in a molecule and the valence electrons or lone pairs of electrons.The diagram is also called a Lewis dot diagram, Lewis dot formula, or electron dot diagram.2024-05-11. Description. Methyl mercaptan is a colorless gas with a smell like rotten cabbage. It is a natural substance found in the blood, brain, and other tissues of people and animals. It is released from animal feces. It occurs naturally in certain foods, such as some nuts and cheese.Steps for Writing Lewis Structures. Example 7.4.1 7.4. 1. 1. Determine the total number of valence electrons in the molecule or ion. Each H atom (group 1) has 1 valence electron, and the O atom (group 16) has 6 valence electrons, for a total of 8 valence electrons. 2.Drawing the Lewis Structure for CO. Video: Drawing the Lewis Structure for CO. For the CO Lewis structure, calculate the total number of valence electrons for the CO molecule. After determining how many valence electrons there are in CO, place them around the central atom to complete the octets. The Lewis structure for CO has 10 valence electrons.Drawing the Structure of Organic Molecules. Although larger molecules may look complicated, they can be easily understood by breaking them down and looking at their smaller components. All atoms want to have their valence shell full, a "closed shell." Hydrogen wants to have 2 e - whereas carbon, oxygen, and nitrogen want to have 8 e -. We use Lewis symbols to describe valence electron configurations of atoms and monatomic ions. A Lewis symbol consists of an elemental symbol surrounded ... Steps of drawing CH3SH lewis structure Step 1: Find the total valence electrons in CH3SH molecule. In order to find the total valence electrons in a CH3SH molecule, first of all you should know the valence electrons present in carbon atom, hydrogen atom as well as sulfur atom. (Valence electrons are the electrons that are …When it comes to decorating your home, lighting is one of the most important elements. A table lamp can be a great way to add a touch of style and personality to any room. At John ...Thiols having the structure R−SH, in which an alkyl group (R) is attached to a sulfhydryl group (SH), are referred to as alkanethiols or alkyl thiols. Thiols and alcohols have similar connectivity. Because sulfur atoms are larger than oxygen atoms, C−S bond lengths – typically around 180 picometres – are about 40 picometers longer than ... Solved in 3 steps with 3 images. SEE SOLUTION Check out a sample Q&A here. Solution for Draw the lewis structure for SH2. Then identify the electron pair geometry (EPG), molecular geometry (MG) bond angle (BA), and polarity (P).…. 2. On your scratch paper, draw the Lewis structure for SH 2. Then answer the following questions based on your structure. a) What is the central atom in the structure? b) How many total valence electrons are in the structure? c) Using the 6N +2 rule, what type of covalent bonds are present in this structure? Step 1. Solution: You can follow these steps to draw the Lewis structure for a thiol ion ( SH A −): Count the valence e... View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question. Steps in Determining Acid-base Strength from Molecular Structure. Step 1: Observe the molecular structure given, and identify the atoms present in the different structures. Step 2: Determine which ...Drawing the Lewis Structure for CO. Video: Drawing the Lewis Structure for CO. For the CO Lewis structure, calculate the total number of valence electrons for the CO molecule. After determining how many valence electrons there are in CO, place them around the central atom to complete the octets. The Lewis structure for CO has 10 valence electrons.Question: Draw a lewis structure for ClF3 and then determine the point group. Draw a lewis structure for ClF3 and then determine the point group. Here’s the best way to solve it. Expert-verified. Share Share. Here’s how to approach this question. Calculate the total number of valence electrons for the chlorine and fluorine atoms combined..

Popular Topics