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The Periodic Table

The Halogens - Reactions with Metals.

The halogens will gain one electron to form an ionic bond with metals.

The halogens will react with

1)  group 1 metals (see reaction with alkali metals)

2)  group 2 metals (see magnesium and calcium).


3)  transition metals  -  for example

iron + bromine     arrow    iron(III) bromide.
2Fe(s)  +    3Br2(l)   arrow           2FeBr3(s)

iron + chlorine     arrow    iron(III) chloride.
2Fe(s)  +    3Cl2(g)   arrow           2FeCl3(s)


4)  group 3 metals  - for example

aluminium + chlorine  arrow aluminium chloride.
2Al(s)  +    3Cl2(g)   arrow           2AlCl3(s)

All of the compounds with metals are ionic salts which form a giant structure.
They are called metal halides
because they are formed from a metal and a halogen.

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