1

How many covalent bonds should form a neutral oxygen atom to follow the octet rule?

1

2

3

4

2

What type of bond exists between the nitrogen atoms of N₂H₂?

Single bond

Double bond

Triple bond

Quadruple bond

3

Which of the following species has a triple covalent bond?

NH₃

CO₂

NO₃^-

NC^-

4

What is the formal charge of boron atom in the molecule BF₄^-?

-2

-1

0

1

5

Which of the following atoms could have an expanded valence shell?

Li

O

S

Ne

6

Which of the following atoms has the highest electronegativity?

F

O

H

Br

Quiz 1 | Lewis Formulas