Question

Assertion: the atomic radius decreases in moving from left to right along A period.
Reason: an increase in nuclear charge tends to pull the electrons closer to the nucleus.
a) both A and R are true, and R is correct explanation of the assertion.
b) both A and R are true, but R is not the correct explanation of the assertion.
c) A is true but R is false.
d) A is false but R is true​

Answer 1

Option a) is the correct answer.

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