Plate things

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Across
  1. 1. The number of protons and neutrons added together, but for a specific isotope.
  2. 4. The number of protons and neutrons added together
  3. 5. A small particle that has specific properties.
  4. 7. The weight of a proton, neutron, and electron. A proton is weighed as one.
  5. 10. An atom with a specific amount of protons.
  6. 11. The amount of energy an atom has
Down
  1. 2. Partices smaller than an atom, usually protons, neutrons, and electrons.
  2. 3. Where the electrons sit.
  3. 6. The number on the periodic table that shows the element number.
  4. 8. The middle of an atom
  5. 9. The protons and electrons added up, where the electrons are counted as a negative.