Chemistry revision

123456789101112131415
Across
  1. 4. A compound that comprises of non-metal(s) only
  2. 8. Unit of measurement for the amount of something
  3. 9. H2O2 is the _________ formula of hydrogen peroxide
  4. 12. How many protons do carbon atoms have?
  5. 13. A diagram that can be used to explain the formulae of compounds
  6. 15. The 'r' in RFM
Down
  1. 1. Which group of atoms gain 3 electrons?
  2. 2. A positive ion
  3. 3. Which group one element produces a flame when reacting with water?
  4. 5. Polyatomic ion with the formula NH3
  5. 6. atoms In the first shell of electrons (in word form)
  6. 7. Another name for the halogen-halide reaction
  7. 8. ____ number that tells us the total number of protons and neutrons in an atom
  8. 10. Gain of electrons
  9. 11. Atoms of the same element with the same number of protons but a different number of neutrons
  10. 14. How many elements exist as diatomic elements?