Question
An element of atomic number $29$ belongs to
✓
Answer
c
$(c)$ $C{u_{29}} - $$\left[ {Ar} \right]$ $3{d^{10}}4{s^1}$.
$(c)$ $C{u_{29}} - $$\left[ {Ar} \right]$ $3{d^{10}}4{s^1}$.
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