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1900's Physics and Wave

Which among t...

Question

Which among the following elements has the largest atomic radii?

A

N a

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B

M g

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C

K

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D

C a

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Solution

The correct option is D $K$
The atomic radii increase down the group and decrease across a period. Thus, for the given options, the atomic radii will increase in the following order: $M g < N a < C a < K$

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Q. Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
a. ₃Li, ₁₄He, ₁₁Na, ₁₅P Which of these elements belong to be period 3?
b. ₁H, ₇N,₂₀Ca, ₁₆S, ₄Be, ₁₈Ar Which of these elements belong tot he second group?
c. ₇N, ₆C, ₈O, ₅B, ₁₃Al Which is the most electronegative element among these?
d. ₄Be, ₆C, ₈O, ₅B, ₁₃Al Which is the most electropositive element among these?
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