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1. Atomic model where electrons don't move around the nucleus in orbits. Electrons exist in
specific energy levels as a cloud.
2. Most of the mass is concentrated in the center of atom. This tiny, dense, positively charged
core called a nucleus.
5. Electrons reside in orbits. They move between each shell when gaining or losing energy.
6. Subatomic particle with a neutral charge
7. Matter is made of small indivisible atoms.í
8. Building block of matter that cannot be broken apart using any chemical means