The Nature of Matter

12345678910111213
Across
  1. 3. a molecule that is covalently bonded H2O
  2. 4. anything that has mass and occupies space
  3. 7. a neutral particle that is found in the nucleus
  4. 8. a molecule that has an ionic bond NaCl
  5. 10. a type of bond where two ions of opposite charges are bonded
  6. 12. is the number of protons plus the number of neutrons
  7. 13. an atom of the same element but has a different number of neutrons
Down
  1. 1. the smallest unit of matter
  2. 2. a positive particle that is found in the nucleus
  3. 5. a negative particle that is found in the energy levels
  4. 6. is the number of protons in an element
  5. 9. a type of bond where atoms share electrons
  6. 11. an atom that has either given or taken an electron and has a charge