Chemistry

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Across
  1. 2. / shape of molecule eg CO2
  2. 4. / charged particle formed when an atom or group of atoms gains or loses electrons
  3. 5. / group name for Group 7
  4. 7. / giant structure of covalent substances eg SiO2, diamond
  5. 11. / neutral subatomic particle
  6. 13. / shape of molecule eg H2O
  7. 14. / type of bond involving shared pair of electrons
  8. 16. / electrons that can move easily from one atom to another
  9. 17. / shape of molecule eg NH3
Down
  1. 1. / postively charged subatomic particle
  2. 3. / atoms with same atomic number but different mass numbers
  3. 6. / negatively charged subatomic particle
  4. 8. / shape of molecule eg CH4
  5. 9. / average mass of all isotopes of a particular element
  6. 10. / reaction in which energy is given out
  7. 11. / location of protons and neutrons
  8. 12. / ion which does not take part in the overall reaction
  9. 15. / substance which speeds up a chemical reaction but is not used up