Metals and reactions

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1.
metal
2.
oxygen
3.
oxide
4.
acid
5.
hydrogen
6.
reactivity
7.
conservationofmass
8.
water
9.
hydroxide
10.
magnesium
11.
iron
12.
copper
13.
zinc
14.
physical
15.
chemical
16.
equation
17.
alkali