Chemistry

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Across
  1. 1. Same as relative atomic mass
  2. 8. The total number of electrons that an atom either gains or loses
  3. 10. The ions are packed together in a regular arrangement
  4. 11. An increase in the oxidation number
  5. 14. Occurs between non-metal atoms and the bond formed
  6. 17. An amount of how much electrons can through
  7. 19. The average mass of the isotopes
  8. 20. Used for ionic compounds
  9. 21. The bonding occurs between metals
Down
  1. 2. A substance that reduces another substance and is itself oxidised
  2. 3. Simultaneous oxidation and reduction
  3. 4. A reduction in the oxidation number
  4. 5. Molecules that have lost one or more electrons
  5. 6. A very hard substance
  6. 7. The oxygen atoms with extra-negatively-charged electrons
  7. 9. A strong electrostatic attraction
  8. 12. Can be measured in g/dm^3 or mol/dm^3
  9. 13. A substance of pencils
  10. 15. The degree of compactness of a substance
  11. 16. A substance that oxidises another substance and is itself reduced
  12. 18. Same as relative atomic mass