Which element has variable valency *
a)Hydrogen
b)Sodium
c)Magnesium
d)Iron
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0
Answer:
(C) IRON
Explanation:
Certain elements have more than one valency. They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency. Copper combines with oxygen to form cuprous oxide (Cu2O) and cupric oxide (CuO).
Answered by
1
Answer:
Iron
Explanation:
Some elements show variable valency because of the different electronic configurations. An atom of an element can sometimes lose more electrons than are present in its valence shell i.e. loss from the penultimate shell and hence exhibit more than 1 or variable valency.
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