Question

when an atom gains 2 electrons, the resulting charge is select the best option.

Explanation:

Step1: Recall electron - charge relationship

An electron has a charge of - 1 unit.

Step2: Calculate total charge change

When an atom gains 2 electrons, the charge change is $2\times(-1)= - 2$.

Answer:

• 2 (corresponding to the option with value - 2)