Atomic particles:

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Define:

An atomic particle is an atom. An example of an atomic particle is a carbon atom.

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Other Topics

1. Electrons
2. Protons
3. Neutrons

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Source:

http://www.windows.ucar.edu/tour/link=/physical_science/physics/atom_particle/sw_atom_particle.html&edu=high
http://www.britannica.com/EBchecked/topic/41762/atomic-particle

Subatomic Particles:

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Define:

Subatomic particles are particles that are smaller than atoms. Examples of subatomic particles are electrons, protons, neutrons, quarks and leptons.

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Other topics

1. Up quarks
2. Down quarks
3. Top quarks
4. Bottom quarks
5. Strange quarks
6. Charm quark

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Source:

http://www.windows.ucar.edu/tour/link=/physical_science/physics/atom_particle/sw_atom_particle.html&edu=high
http://www.britannica.com/EBchecked/topic/570533/subatomic-particle