1. Covalent bonding occurs between which type of elements?

a) Metal and non-metal atoms
b) Two or more non-metal atoms
c) Two or more metal atoms
d) Noble gas atoms

2. What is shared between atoms in a covalent bond?

a) A pair of protons
b) A pair of neutrons
c) A pair of electrons
d) protons and electrons

3. According to the octet rule most atoms when they react tend to achieve how many electrons in their outer shell?

a) 2
b) 4
c) 6
d) 8

4 .Most covalent substances have a small structure but elements such as carbon and silicon in group 4 of the periodic table can form giant macromolecular structures

5. Which of the following is an example of a small covalent molecular substance?

a) Diamond
b) Sodium chloride
c) Ammonia
d) Magnesium chloride

6. A single covalent bond involves the sharing of a pair of .

7. How many electrons are shared in a triple covalent bond?

a) 2
b) 4
c) 6
d) 8

8. Why is nitrogen gas (N₂) a relatively unreactive gas?

a) It forms weak intermolecular bonds
b) It contains a double covalent bond between the nitrogen atoms
c) It contains two lone pairs of electrons
d) It contains a triple covalent bond between the nitrogen atoms

9. In a dot and cross diagram the dots and crosses represent the outer shell of different atoms.

10. Which force holds the two atoms together in a covalent bond?

a) Gravitational force between the shared electrons
b) Magnetic force between the nuclei and the shared electrons
c) Strong nuclear force
d) Electrostatic force of attraction between the shared electrons and the nuclei