Here's the breakdown of protons, neutrons, and electrons in helium:

* Protons: 2

* Neutrons: 2 (for the most common isotope, Helium-4)

* Electrons: 2

Explanation:

* Atomic Number: Helium's atomic number is 2, which means it has 2 protons. The number of protons defines an element.

* Mass Number: The most common isotope of helium is Helium-4, which has a mass number of 4. This means it has 2 protons + 2 neutrons = 4.

* Neutral Atom: Atoms are neutral, meaning they have an equal number of protons (positive charge) and electrons (negative charge).