Chemistry crossword

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Across
  1. 1. The total number of neutrons and protons
  2. 4. amount of space an object takes up
  3. 5. Shape forms to container, volume stays same. Particles move medium speed
  4. 6. anything that has mass and volume
  5. 7. Positively charged particles of an atom
  6. 10. Negatively charged particles that orbits the nucleus
  7. 12. Rounded minus the atomic number to get the number of neutrons in an atom
  8. 13. Amount of matter in an object
Down
  1. 2. The number of protons and electrons in the nucleus of an atom
  2. 3. Purest state, a group of one kind of atom.
  3. 8. Charge less particle found in the nucleus of an atom
  4. 9. shape stays same unless physically changed, particles move slowly. volume stays the same
  5. 11. The shape and volume varies, particles moving fast.
  6. 14. Smallest part of an element that still has its characteristics