The periodic table

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123456789101112131415161718192021
Across
  1. 4. least reactive group one element
  2. 7. most reactive group seven element
  3. 9. elements in this group have full electron shells
  4. 11. these elements form coloured compounds
  5. 12. form of carbon that conducts electricity
  6. 14. these elements react with metals to make salts
  7. 15. metals group 1 of the periodic table
  8. 17. oxide that reacts with both acids and bases
  9. 21. elements found uncombined in the Earth's crust
Down
  1. 1. this element is named after its colour
  2. 2. vertical column of the periodic table
  3. 3. element with the highest melting point
  4. 5. metal with a melting point below standard temperature
  5. 6. elements are arranged in order of this number
  6. 8. element named after the creator of the modern periodic table
  7. 10. this tells us how many outer electrons an element has
  8. 13. this tells us how many occupied energy levels an element has
  9. 16. elements with low melting and boiling points
  10. 18. this element burns with a lilac flame
  11. 19. this element is named after its colour in the gas phase
  12. 20. this group contains elements in three different states of matter