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Which Lewis electron-dot diagram represents a molecule having a nonpolar covalent bond?*
Which Lewis electron-dot diagram represents a nitrogen atom in the ground state?*
Which Lewis electron-dot diagram represents a fluoride ion?*
Which Lewis electron-dot diagram represents the bonding in potassium iodide?*
Which Lewis electron-dot diagram represents a molecule of H2S?*
Which Lewis electron-dot diagram represents an atom of nitrogen in the ground state?*
Base your answers to questions 7 on the information below and on your knowledge of chemistry.
The diagrams below represent ball-and-stick models of two molecules. In a ball-and-stick model, each ball represents an atom, and the sticks between balls represent chemical bonds.
Draw a Lewis electron-dot diagram for an atom of the element present in all organic compounds.*
Draw a Lewis electron-dot diagram for an atom of silicon.*
Base your answers to questions 9 on the information below and on your knowledge of chemistry.
Silver-plated utensils were popular before stainless steel became widely used to make eating utensils. Silver tarnishes when it comes in contact with hydrogen sulfide, H2S, which is found in the air and in some foods. However, stainless steel does not tarnish when it comes in contact with hydrogen sulfide.
Draw a Lewis electron-dot diagram for the compound that tarnishes silver.*
Base your answers to questions 10 on the information below and on your knowledge of chemistry.
The Lewis electron-dot diagrams for three substances are shown below.
Describe, in terms of valence electrons, how the chemical bonds form in the substance represented in diagram 1.*
Draw a Lewis electron-dot diagram for a molecule of hydrogen fluoride, HF.*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
The formulas and names of four chloride compounds are shown in the table below.
In the space in your answer booklet, draw a Lewis electron-dot diagram for a molecule of HCl.*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
The balanced equation below represents a reaction.
O2(g) + energy → O(g) + O(g)
In the space in your answer booklet, draw a Lewis electron-dot diagram of one oxygen atom.*
Draw a Lewis electron-dot diagram for a molecule of bromomethane, CH3Br.*
Draw a Lewis electron-dot diagram for a chloride ion, Cl−.*
