Periodic Table

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  1. 2. chemical elements in group 18 of the periodic table.
  2. 5. an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal.
  3. 8. Very poisonous
  4. 9. metal is soft and white with a silvery lustre
  5. 12. Atomic number of 2
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  1. 1. a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements
  2. 3. It is one of the least reactive chemical elements and is solid under standard conditions.
  3. 4. has an atomic number of 11
  4. 6. soft, silvery-white, metal that heads group 1
  5. 7. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a trivalent metalloid and semiconductor.
  6. 10. colourless, odourless, tasteless gas essential to living organisms,
  7. 11. one of the most reactive of the elements