Bonding starter

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Across
  1. 1. The lightest and most abundant element in the universe. (8)
  2. 3. A property calculated as mass divided by volume. (7)
  3. 8. The outer shell electrons involved in chemical bonding. (7)
  4. 10. The type of bond formed between metal atoms. (8)
  5. 11. The smallest unit of a compound that retains its properties. (8)
  6. 12. A combination of substances that are not chemically bonded. (7)
  7. 13. A positively charged particle found in the nucleus of an atom. (6)
  8. 14. A substance formed when two or more elements are chemically bonded together. (8)
Down
  1. 2. A negatively charged particle found in atoms. (8)
  2. 4. A substance made of only one type of atom. (7)
  3. 5. A noble gas used in balloons because it is lighter than air. (6)
  4. 6. Atoms of the same element with different numbers of neutrons. (7)
  5. 7. A non existant silly element that makes the periodic table feel cheesy?..;) (8)
  6. 9. A particle found in the nucleus of an atom with no charge. (7)
  7. 15. A table that organizes elements by increasing atomic number. (8)