The ratio of radius of first orbit in hydrogen to the radius of fir... VIDEO
The ratio of radius of first orbit in hydrogen to the radius of first orbit in deuterium will be :-
(1) \( 1: 1 \)
(2) \( 1: 2 \)
(3) \( 2: 1 \)
(4) \( 4: 1 \)
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