2.2.7 Dative Covalent Bonding

Question 1

What happens in dative covalent bonding?

Answer 1

One of the atoms supplies both the shared electrons to the covalent bond.

Question 2

When might the octet rule be broken?

Answer 2

• There may not be enough electrons to reach an octet.
• More than four electrons may pair up in bonding.

Question 3

Which two elements can pair up any unpaired electrons without reaching an octet?

Answer 3

Beryllium and boron.

Question 4

When can the octet be expanded?

Answer 4

Groups 15-17 from period 3.