What happens when you change the number of electrons in an atom

When an atom has gained or lost electrons (negative charge), it becomes an ion.

In this sense:

If a neutral atom loses electrons, it remains with an excess of positive charge and transforms into a positive ion or cation, whereas if a neutral atom gains electrons, it acquires an excess of negative charge and transforms into a negative ion or anion.

It is then how ions form bonds with other atoms differently depending on the number of electrons they have.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2