MCQ
Diagonal relationship is quite pronounced in the elements of :
- ✓$2^{nd}$ and $3^{rd}$ periods
- B$1^{st}$ and $2^{nd}$ periods
- C$\ce{II}$ and $\ce{III}$ groups
- D$3^{rd}$ and $4^{th}$ periods
✓
Answer
Correct option: A.
$2^{nd}$ and $3^{rd}$ periods
A diagonal relationship exists between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table.
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