Atomic Theory

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  1. 3. one of the three subatomic particles that make up an atom. it is neutral; it doesn't have a charge.
  2. 7. the number of protons in the nucleus of each atom of that element.
  3. 8. a negatively charged subatomic particle that can be either bound to an atom or free (not bound)
  4. 9. a subatomic particle with a positive electric charge
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  1. 1. basic particle of the chemical elements. consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically-bound swarm of electrons
  2. 2. a positively charged region at the center of the atom. It consists of two types of subatomic particles packed tightly together. The particles are protons, which have a positive electric charge, and neutrons, which are neutral in electric charge.
  3. 4. a well-supported explanation of observations.
  4. 5. the total number of protons and neutrons in an atom.
  5. 6. atoms of the same element with different numbers of neutrons. have different atomic masses.