Periodic Table/Atomic Structure

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Across
  1. 3. how positive or negative something is
  2. 7. the smallest unit of an element
  3. 8. the number of protons and neutrons in an atom
  4. 9. A form of matter that cannot be separated into simpler substances by ordinary chemical methods.
  5. 12. how electrons are arranged around the nucleus
  6. 13. the number of protons in an atom
Down
  1. 1. The one or two-letter abbreviation for the name of an element, found on the Periodic Table.
  2. 2. positive charge
  3. 4. negative charge
  4. 5. a very small piece of something
  5. 6. an atom that has a charge not equal to zero
  6. 10. holds protons and neutrons
  7. 11. are atoms of the same element having different masses, due to varying numbers of neutrons