A) The combining capacity of an element
B) The atomicity of an element
C) The oxidation number of an element
D) All of the above
Correct Answer: A
Solution :
Valency is the combining capacity of an element. \[\text{e}\text{.g}\text{.,}\] In \[{{H}_{2}}S\] sulphur combined with two hydrogen atoms, therefore the valency of sulphur is two.
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