MCQ
Predict the position of an element having the electronic configuration $\ce{1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^5 4 s^1}$.
- ✓Period $4,$ group $6.$
- BPeriod $6,$ group $4.$
- CPeriod $3,$ group $1.$
- DPeriod $4,$ group $5$.
✓
Answer
Correct option: A.
Period $4,$ group $6.$
$n = 4$ hence, element lies in $4^{th}$ period.
Group $= \ce{ns + (n - 1)d = 1 + 5 = 6.}$
Group $= \ce{ns + (n - 1)d = 1 + 5 = 6.}$
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