Question

how is an atoms net charge determined?
a by the size of the atomic nucleus
b by the relative number of protons and electrons.
c by the speed at which the atom is moving.
d by the total number of neutrons.

Explanation:

Protons have a positive charge and electrons have a negative charge. The net charge of an atom is the difference between the number of protons and electrons. Neutrons are neutral and the size of the nucleus and the speed of the atom's movement do not determine its net - charge.

Answer:

B. By the relative number of protons and electrons.