The valency of all metals is considered 1 Positive 2 Negative 3 Neutral 4 None of these
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Explanation:
Correct option is
C
negative ions
The primary or principal valency; this is the ionisable valency.
A metal always gives electron and becomes positively charged that can be neutralized by bonding with negative ion only. In a coordination compound, the number of negative ions needed to satisfy the charge on the central metal ion is it's primary valency.
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