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The Periodic Table

The Halogens - Reactions with Metals.

How do the Halogens React with Metals?

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

The halogens will react with

1. group 1 metals - see the reaction with alkali metals.

2. group 2 metals - see the reaction with 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 metal halide compounds are ionic salts which form a
crystalline giant structure. They are called
metal halides because they are made from a metal and a halogen.

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