Periodic Table

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Created by
Henry O’Connor

Cards (11)

  • Mendeleev’s periodic table was ordered in atomic weight, whilst the modern is ordered in atomic number
  • No Noble Gases present in Mendeleev’s table, as they were hard to find being unreactive.
  • There were gaps within Mendeleev’s periodic table, for undiscovered elements.
  • There was no Transition Metal Block, in the middle of the table, nor any lanthanides or actinides separate at the bottom.
  • Element: Pure substance containing only 1 type of element, cannot be broken down further by chemical means.
  • There are 11 gases in the periodic table, 6 of which are noble gases and 5 are diatomic elements.
  • Metals have a high melting point, they are able to be dented with a hammer so they are malleable, can be stretched into a wire so they are ductile, make a sound when hit so they are sonorous and good conductors of heat and electricity.
  • Group 1- Alkali Metals
    Group 2- Alkaline Earth Metals
    Group 7- Halogens
    Group 8(0)- Noble Gases
  • There are 2 liquids in the periodic table.
  • Liquids:
    Mercury, Symbol Hg, Silvery white
    Bromine, Symbol Br, Red Brown
  • Reactivity is the same within groups as they have the same number of electrons on their outer shell.