Periodic Table Crossword

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Across
  1. 6. METALS Any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium and francium, whose hydroxides are alkalis.
  2. 8. A light, ductile, silver-white, metallic elements that burns with a dazzling white light.
  3. 9. Chloride + __________ = salt.
  4. 11. An elementary particle with no charge.
  5. 13. A heavy, silver-white , highly, toxic metallic element, the only that is liquid at room temperature.
  6. 15. A precious yellow metallic element, highly malleable and ductile.
  7. 16. GASES Any of the chemically inert gaseous elements including helium, neon, argon, krypton, xenon and radium.
  8. 17. SHELL A grouping of electrons surrounding the nucleus of an atom.
Down
  1. 1. Used in pool water.
  2. 2. Has an atomic number of three.
  3. 3. One of two elements that are radioactive.
  4. 4. An element when put in food products, makes bones and teeth strong.
  5. 5. An element that does not belong to any group of the Periodic Table.
  6. 7. An elementary particle with a positive charge.
  7. 10. The result of the combination of two oxygen atoms.
  8. 12. TEMPERATURE A comfortable temperature range indoors, usually considered to be 20-25 Degrees Celsius.
  9. 14. A malleable, ductile, metallic element that is a reddish-brown colour
  10. 18. The positively charged mass within an atom, made up of neutrons and protons.