Periodic Table

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Across
  1. 2. Unusually for metals, lithium, sodium and potassium do this on water
  2. 5. Argon, krypton and xenon are used in these bright things
  3. 9. These metals in the middle part of the periodic table usually form coloured compounds
  4. 12. The charge on halide ions such as chloride ions
  5. 14. Are you sure? Chlorine forms at this electrode during the electrolysis of concentrated sodium chloride solution
  6. 15. Chlorine does this to damp litmus paper
  7. 18. Alkaline metal compounds formed when group 1 elements react with water
Down
  1. 1. The common name for group 1
  2. 3. Chlorine is used to kill bacteria in these watery things
  3. 4. Salt-formers found in a group
  4. 6. Flammable gas produced when sodium reacts with water
  5. 7. Group7 elements are non-
  6. 8. A common name for concentrated sodium chloride solution
  7. 10. The group 0 gases are described as this because they are inert
  8. 11. The melting points of transition metals are this
  9. 13. The type of bonding in compounds of group 1 and group 7 elements
  10. 16. The physical state of bromine at room temperature
  11. 17. The colour of iodine vapour