Question

*An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?

A. +25
B. +30
C. -25
D. -30
Please explain why you got the answer because I don't get this and I have a test next week about this, thank you! Plz

Answer 1

The charge of the atom's nucleus would be A. +25. The reason it is +25 is because the only subatomic particle that has an electrical charge and is located in the nucleus are protons. Since there are 25 protons in this atom's nucleus, the charge given to the subatomic particles, is the charges of the protons.

Answer 2

An atom contains protons, neutrons and electrons.
However, an atom's nucleus contains only neutrons and protons. Therefore, the nucleus has a charge equivalent to the number of protons (because neutrons are neutral). This charge is balanced by the electrons in the electronic shells.
Thus, the answer is:
A. +25