The negatively charged particles in an atom?

Answer 1

In most conventional atoms there are three particles, which individually break down into quantum particles. Unbroken-down, those three are the negatively charged electron, the positively changed Proton, and the uncharged Neutron.

However, there is another type of matter which has characteristics almost nearly opposite. Its name is Antimatter, and its fundamental components are the positively charged Positron, the negatively charged Antiproton (sometimes written Anti-Proton) and the uncharged Antineutron (sometimes written Anti-Neutron).

Neutrons and Antineutrons are almost indistinguishable, except at the quantum level (they have opposite quarks -- 1 up and two downs versus 1 down and two ups), but they still annihilate each other on contact, the same way that electrons and positrons annihilate each other, and the way that Protons and Antiprotons do.

Answer 2

There are three particles in an atom

Proton (positively charged)

Neutron (no charge)

Electron (negatively charged)