Periodic Table

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Across
  1. 3. Elements that are malleable, ductile and lustrous.
  2. 6. The number of an element on the periodic table.
  3. 9. There are 92 of these that occur naturally.
  4. 10. A type of change which can't be reversed.
  5. 12. The lightest element.
  6. 13. A type of change which can easily be reversed.
  7. 17. A particle that is neither positive or negative.
  8. 19. A non-shiny material.
  9. 20. The elements in Group 7.
Down
  1. 1. Difficult to bend, will snap.
  2. 2. A positively charged particle.
  3. 4. mass The number of protons plus neutrons in an atom.
  4. 5. Elements with low melting points and are poor conductors.
  5. 7. The elements in Group 8.
  6. 8. The chemicals mixed together before a reaction.
  7. 9. A negatively charged particle.
  8. 11. Shiny.
  9. 13. The result of a chemical reaction
  10. 14. This element is essential for all life on Earth.
  11. 15. A row on the Periodic Table.
  12. 16. A column of elements on the Periodic Table.
  13. 18. This gas makes up 79% of the Earth's atmosphere.