An atom, the fundamental building block of matter, contains two types of charged particles: protons and electrons. While there's a third kind of subatomic particle within the atom called a neutron, it carries no electrical charge.

Protons:

Located in the nucleus, the atom's central core.
Carry a positive electrical charge (equal but opposite to an electron's charge).
Number of protons determines the element's identity (e.g., all hydrogen atoms have 1 proton, all helium atoms have 2, etc.).
Protons contribute most of the atom's mass.

Electrons:

The interplay of these charges:

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