Properties of Atoms

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Across
  1. 2. versions of the same element with different numbers of neutrons
  2. 4. first man to conceive of atoms.
  3. 7. used to measure the mass of atoms
  4. 8. weighted average of all isotopes in an element
  5. 10. particle in an atom that doesn't have a charge.
  6. 12. negative particle in an atom
  7. 14. smallest part of an element with unique properties.
  8. 16. father of modern chemistry
  9. 17. location where electrons are likely to be.
Down
  1. 1. positive center of an atom
  2. 3. table containing all known elements
  3. 5. gives number of protons in an element
  4. 6. tiny particles that make up protons and neutrons
  5. 9. number of protons + neutrons in an atom
  6. 11. positive particle in an atom
  7. 13. element with a mass number of 16
  8. 15. element on the periodic table with 13 protons