A helium atom with 2 protons, 2 neutrons, and 2 electrons has an overall charge of zero. Here's why:

* Protons: Protons have a positive (+) charge.

* Electrons: Electrons have a negative (-) charge.

* Neutrons: Neutrons have no charge (they are neutral).

In a neutral atom, the number of protons (positive charges) is equal to the number of electrons (negative charges). Since helium has 2 protons and 2 electrons, the positive and negative charges cancel each other out, resulting in a net charge of zero.