State the valencies of the following elements : Magnesium and Sodium.
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Answer:
magnesium is Mg2+
sodium is Na+
Explanation:
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Magnesium has the valency +2.
Because magnesium need 6 electrons to attain octet rule. But it is easy to lose 2 electrons than to gain 6 electrons.
Because gaining of electrons need more energy.
Sodium has the valency+1.
Because sodium need 7 electrons to attain octet rule. But it is easy to lose to electrons than to gain 7 electrons.
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