MCQ
Which pair of atomic numbers represents $s$-block elements
- A$7, 15$
- B$6, 12$
- C$9, 17$
- ✓$3, 12$
✓
Answer
Correct option: D.
$3, 12$
d
$(d)$ Last electron goes to $s$-subshell.
$(d)$ Last electron goes to $s$-subshell.
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