NEET Chemistry: Class 11, Chapter 4: Atomic Structure questions with solutions

Q1. Electronic configuration \( [\boldsymbol{K} \boldsymbol{r}] \boldsymbol{4} \boldsymbol{d}^{10} \) belongs to:

1. Period(4) Group(10) Block(d)
2. Period(5) Group(12) Block (d)
3. Period(5) Group(10) Block \( (d) \)
4. Period(4) Group(12) Block(d)

Answer: Period(5) Group(10) Block \( (d) \)

The configuration shows 4d^10, indicating the 5th period (n=5) and a full d-subshell (10 electrons), placing it in Group 10.