05 Chemical Bonding

How many valence electrons does an element in group 1 have?

• 1

• 2

• 3

• 4

How many valence electrons does a group 14 element have?

• 4

• 14

• 6

• 2

How many valence electrons does a group 18 element have?

• 8

• 18

• 6

• 2

The octet rule states that, in chemical compounds, atoms tend to have ____.

• the electron configuration of a noble gas

• more protons than electrons

• eight electrons in their principal energy level

• more electrons than protons

How does calcium obey the octet rule when reacting to form compounds?

• It gains electrons.

• It gives up electrons.

• It does not change its number of electrons.

• Calcium does not obey the octet rule.

How does oxygen obey the octet rule when reacting to form compounds?

• It gains electrons.

• It gives up electrons.

• It does not change its number of electrons.

• Oxygen does not obey the octet rule.

What is the name given to the electrons in an atom’s highest occupied energy level?

• orbital electrons

• valence electrons

• anions

• cations

How many valence electrons are in an atom of phosphorus?

• 2

• 3

• 4

• 5

How many valence electrons are in an atom of magnesium?

• 2

• 4

• 6

• 8

What is the charge of a strontium ion?

• 2-

• 1-

• 1+

• 2+