the periodic table

• groups are…


  columns going down the periodic table
• elements in the same group have similar what?

  Properties
• group one is called

  alkali metals
• group seven is called

  the halogens
• group zero is called

  the Nobel gases
• every element has a chemicaL…


  symbol
• symbols always start with a…


  capital letter
• every compound has a chemical…


  formula
• what do chemical formulas tell you?


  how many atoms of each element are joined together as a compound
• what colour flame does potassium burn when reacted with water 


  lilac flame
• why are the group one metals stored in oil

  to stop a reaction with water or oxygen in the air
• name two common properties of non metals


  dull and brittle
• Define an ore


  is a rock that contains a significant amount of metal worth extracting
• carbon can be used to extract metals from compounds if the metal is less reactive than carbon