The Periodic Table

Cards (7)

  • How is the modern Periodic Table ordered?
    By atomic number
  • How were the early lists of elements ordered?
    By atomic mass
  • Why did Mendeleev swap the order of some elements?
    To group them by their chemical properties
  • Why Mendeleev leave gaps in his Periodic Table?
    To leave room for elements that had not yet been discovered
  • Why do elements in a group have similar chemical properties?
    because they have the same number of electrons in their outer shell
  • Where are metals and non-metals located on the Periodic Table?
    Metals are to the left and non-metals to the right
  • What name is given to a group 1 elements?
    They are metals that react with water to form an alkali.