Lewis Structures and Chemical Bonding Quiz

In the structure for methane CH₂ which elements would be considered terminal atoms?

• Carbon

• Hydrogen

• Chlorine

• Fluorine

Tags

112.43.c.6.E

112.43.c.7.C

112.43.c.7.D

112.43.c.7

Dichlorodifluoromethane CCI₂F₂ is known as freon-12. What is freon's central atom?

• Carbon

• Chlorine

• Fluorine

• Hydrogen

Tags

NGSS.MS-PS1-1

How many shared pairs of electrons does water have?

Answer explanation

Water has two shared pairs of electrons. This is because water molecule consists of two hydrogen atoms and one oxygen atom. The oxygen atom forms two covalent bonds with the hydrogen atoms, resulting in two shared pairs of electrons. These shared pairs of electrons create a bent shape in the water molecule, giving it its unique properties such as polarity and ability to form hydrogen bonds.

Tags

NGSS.HS-PS1-2

Consider the proposed Lewis structures for the stated formulas. Identify those that do not violate the rules for electron dot structures. Select all that apply.

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Tags

NGSS.HS-PS1-2

Consider the proposed Lewis structures for the stated formulas. Identify those that do not violate the rules for electron dot structures. Select all that apply.

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• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many lone pairs of electrons would be on the central atom of ammonia NH₃?

What determines which atom will be the central atom in a chemical bonding structure?

• It comes first in the formula

• The one with the least ionization energy

• The least electronegative atom

• The least electronegative atom that isn't hydrogen.

Draw the correct Lewis Structure for OF₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Draw the correct Lewis Structure for Pl₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Draw the correct Lewis Structure for SO₄^-2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2