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Alkali Metals ­ Group 1
· React with water to form hydroxides
· All have the same general equation...
2Li (s) + 2H2O (l) 2LiOH (aq) + H2 (g)
You can replace the Li with any
other alkali metal…read more

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Alkali Metals ­ Group 1
· All react with Oxygen in the same way...
4Li (s) + O2 (g) 2Li2O (s)…read more

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Alkali Metals ­ Group 1
· And the Halogens...
2Li (s) + Cl2 (g) 2LiCl (s)
· Make sure you are able to explain why alkali
metals are more reactive as they go down
(Remember last lesson...)…read more

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Halogens ­ Group 7
· Coloured elements ­ they get darker as they
go down
· Fluorine ­ Fpale yellow gas
· Chlorine ­ Cl yellow/green gas
· Bromine ­ Br dark red liquid + brown vapour
· Iodine ­ I black solid + purple vapour
SUBLIMATION…read more

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Halogens ­ Group 7
· Always covalent molecules ­ Cl2
· Melting point and boiling points increase as
you go down gas solid
· React to form ionic salts
· Have -1 ions (Cl-1)
· Form covalent bonds with non-metals
H2 (g) + Cl2(g) 2HCl (g)
HCl (g) + H2O H+ (aq) + Cl- (aq)…read more

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