Unit 7_Covalent Bonding Exam Review

Front

Hydrogen needs _____ electrons in its valence shell to be stable.

Back

2

Front

What is the name of the acid HNO₂?

Back

nitrous acid

Front

Is this the correct structure for CH₂O?

Back

Yes

Front

NH₃ has how many lone pairs?

Back

1

Front

What is the name for this acid H₂SO₄?

Back

sulfuric acid

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full set of eight valence electrons.

Front

What is the difference between a polar and nonpolar covalent bond?

Back

A polar covalent bond has unequal sharing of electrons, while a nonpolar covalent bond has equal sharing.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together by covalent bonds.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs can affect the shape of a molecule by repelling bonding pairs of electrons.