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42. The radius of the smallest electron orbit in hydrogen-like ion is (0.51/4 × 10-10) metre; then it is :- (1) hydrogen atom (2) H+ (3) Li2+ (4) Be3+

42. The radius of the smallest electron orbit in
hydrogen-like ion is (0.51/4 × 10-10) metre; then
it is :-
(1) hydrogen atom (2) H+
(3) Li2+ (4) Be3+

Grade:12th pass

2 Answers

jitendra
18 Points
3 years ago
42. The radius of the smallest electron orbit in
hydrogen-like ion is (0.51/4 × 10-10) metre; then
it is :-
(1) hydrogen atom (2) H+
(3) Li2+ (4) Be3+
Rohit Sharma
63 Points
3 years ago
First of all the radius for hydrogen atom should be 0.53/4 x 10-10
We know that Bohr’s radius is,
r = 0.53 n2/z
So for be the value of 4 and for the smallest orbit n = 1
Therefore, r = 0.53 x ¼ Amstrong = 0.53/4 x 10-10 m

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