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Oxidation state of pure Mg(s) is:
0
Oxygen usually has oxidation state:
−2
Hydrogen usually has oxidation state:
+1
Group 1 metals usually have oxidation state:
+1
Group 2 metals usually have oxidation state:
+2
Oxidation means:
loss of electrons
Reduction means:
gain of electrons
OIL RIG means:
oxidation is loss, reduction is gain
If oxidation number increases, the substance is:
oxidized
If oxidation number decreases, the substance is:
reduced
The reducing agent is:
oxidized
The oxidizing agent is:
reduced