Periodic Table Crossword

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Across
  1. 1. Chloride + __________ = salt.
  2. 6. A heavy, silver-white , highly, toxic metallic element, the only that is liquid at room temperature.
  3. 8. An elementary particle with no charge.
  4. 10. An element when put in food products, makes bones and teeth strong.
  5. 12. A light, ductile, silver-white, metallic elements that burns with a dazzling white light.
  6. 14. Used in pool water.
  7. 16. A precious yellow metallic element, highly malleable and ductile.
  8. 18. GASES Any of the chemically inert gaseous elements including helium, neon, argon, krypton, xenon and radium.
Down
  1. 2. The result of the combination of two oxygen atoms.
  2. 3. An elementary particle with a positive charge.
  3. 4. Has an atomic number of three.
  4. 5. The positively charged mass within an atom, made up of neutrons and protons.
  5. 7. SHELL A grouping of electrons surrounding the nucleus of an atom.
  6. 9. One of two elements that are radioactive.
  7. 11. A malleable, ductile, metallic element that is a reddish-brown colour
  8. 13. METALS Any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium and francium, whose hydroxides are alkalis.
  9. 15. An element that does not belong to any group of the Periodic Table.
  10. 17. TEMPERATURE A comfortable temperature range indoors, usually considered to be 2025 Degrees Celsius.