JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The radius of first orbit of

\mathrm{H}

-atoms is

0.529\mathop {\text{A}}\limits^ \circ

. The radius of first orbit of

\mathrm{D}

-atoms should be

View answer and explanation

Correct option: B

slightly less than

0.529\mathop {\text{A}}\limits^ \circ

Option B (slightly less than

0.529\mathop {\text{A}}\limits^ \circ

) is correct because the radius depends on the reduced mass, which is slightly larger for deuterium than for hydrogen, leading to a slightly smaller radius.

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