what is valency find valency of chlorine and magnesium
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Magnesium (Atomic number = 12) has electronic configuration 2, 8, 2. It loses 2 electrons to complete octet configuration in its valence shell. Chlorine (Atomic number = 17) has electronic configuration 2, 8, 7. It gains 1 electron to complete octet configuration in its valence shell.
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Valency of chlorine = 1
One atom of hydrogen combines with one atom of chlorine to form HCl, the valency of chlorine is 1.
Valency of magnesium = 2
Magnesium has valency equal to 2 + because the electronic configuration of Mg is [2,8,2].
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