2024 · Q67
The correct order of atomic radius of Li, Na, Be and O is
General KnowledgeChemistry
- ANa > Li > Be > O
- BNa > Be > Li > O
- CBe > Li > Na > O
- DO > Be > Li > Na
Explanation
Atomic radius increases down a group and decreases across a period. Sodium is below lithium, so Na > Li; across period 2, radius decreases from Li to Be to O. Hence the order is Na > Li > Be > O. The answer is (A).