Chemistry Crossword By Kiratvir, Lyndon

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Across
  1. 4. Atomic Mass 39.948 u, Discovered by Lord Rayleigh
  2. 5. Year of Discovery 1808 Discovered by Humphry Davy
  3. 6. base of life
  4. 10. atomic mass 47
  5. 11. boiling point is 2858°C
  6. 12. Melting point:1538°(1811.15k)
  7. 13. colourless
Down
  1. 1. Strong as steel half the density
  2. 2. the 24 most abundant element
  3. 3. Boiling Point 4000°C, Year of Discovery 1808
  4. 5. Density (when liquid at melting point)8.86 g/cm
  5. 6. atomic mass 29
  6. 7. Melting Point -71°C, Discovery Date: 1900
  7. 8. makes up 21% of earths atmosphere
  8. 9. Atomic Mass:4.002602
  9. 10. Atomic Mass :22.990 u, Discovery Date:1807