periodic table

• group 1 are alkali metals
• alkali are very reactive, have low boiling points, have low densities and are soluble in water
• what are the properties of transition metals?

  good conductors and catalysts

  dense and strong

  often coloured
• what do the alkali metals react vigorously with?

  water, oxygen and chlorine
• what are the group 7 elements called?

  the halogens (have coloured vapours)
• the halogens are less reactive as you go down
• what are the group 0 elements called?

  the noble gases (are colourless)
• the noble gases boiling point increases as you move down