Question

In the electronic structure of $H_{2}S{O}_4$, the total number of unshared electrons is:

• A. 20
• B. 16
• C. 12
• D. 8

Answer 1

The correct option is B 16

Shared pairs of electrons are electrons that are used in covalent bonding. Unshared pairs of electrons are electrons that remain in the outer shell of the atom that isn't used in a covalent bond.

There are 16 unshared electrons, 4 electrons in each O atom.