MCQ
The correct order for the decrease in atomic radii is
- ✓$Li < Be < B < C$
- B$Li > Be > B > C$
- C$C < Li < Be < B$
- D$Be < B > C < Li$
✓
Answer
Correct option: A.
$Li < Be < B < C$
(a) $Li < Be < B < C$
Explanation: In a period moving from left to right, the effective nuclear charge increases because the next electron fills in the same shell. So the atomic size decreases.
Explanation: In a period moving from left to right, the effective nuclear charge increases because the next electron fills in the same shell. So the atomic size decreases.
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