Periodic Table IGCSE

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Across
  1. 2. very reactive group 1 metals with one outer shell electron
  2. 8. a reaction where a more reactive halogen replaces a less reactive one
  3. 9. a table that arranges elements by atomic number and shows patterns in their properties
Down
  1. 1. reactive group 7 nonmetals with seven outer shell electrons
  2. 3. compounds formed when halogens gain electrons in reactions
  3. 4. elements that have properties of both metals and nonmetals
  4. 5. a vertical column in the periodic table with elements that have similar properties
  5. 6. how easily a substance reacts with other substances
  6. 7. a horizontal row in the periodic table showing elements with the same number of shells