When an alkaline earth metal, M, reacts with oxygen the formula of the compound produced will be
2 answers:
D as the oxygen has gained to electrons from the magnesium in the reaction.
The answer is M2O
why?
the assumed valency of M should be 1+ ( because it reacts with oxygen and the valency is not provided)
the valency of oxygen is O2-
thus, by cris cross technique, we get M2O
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