The correct order of atomic radius of $L i, B e$ and $B$ is:

B > L i > B e

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L i > B > B e

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L i > B e > B

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B > B e > L i

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Solution

The correct option is C $L i > B e > B$
The correct order of atomic radius of $L i, B e$ and $B$ is $L i (1.23) > B e (0.89) > B (0.80)$ . Hence, the option C is the correct answer.
In the second period, the covalent radii decrease from $L i$ to $F$ .

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Question 18
Arrange the following elements in the order of their increasing nonmetallic character
Li, O, C, Be, F
(a) F < O < C < Be < Li
(b) Li < Be < C < O< F
(c) F < O < C < Be < Li
(d) F < O < Be < C < Li

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The correct order of atomic radius of Li, Be and B is:

The correct option is C Li>Be>BThe correct order of atomic radius of Li, Be and B is Li(1.23)>Be(0.89)>B(0.80). Hence, the option C is the correct answer.In the second period, the covalent radii decrease from Li to F.

The correct order of atomic radius of $L i, B e$ and $B$ is:

The correct option is C $L i > B e > B$
The correct order of atomic radius of $L i, B e$ and $B$ is $L i (1.23) > B e (0.89) > B (0.80)$ . Hence, the option C is the correct answer.
In the second period, the covalent radii decrease from $L i$ to $F$ .