Zn and Cd metals do not show variable valency because : (a) They have only two electrons in the ...

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Zn and Cd metals do not show variable valency because :
(a) They have only two electrons in the outermost subshells
P
(b) Their \( d \)-subshells are completely filled
W.
(c) Their \( d \)-subshells are partially filled
(d) They are relatively soft metals
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