Atomic radius of hydrogen is 37 pm. Express it in metres

CBSE Class 10 CBSE Class 10 Science
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1

(a) Atomic radius of hydrogen is 37 pm. Express it in metres.
(b) How does atomic size vary in a group and in a period?

2

a) 1 pm = ${{10}^{-12}}$ m
Atomic radius = 37 x ${{10}^{-12}}$ m
(b) In a group - Increases down the group.
In a period - Decreases in moving from left to right.