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Consider the following parameters with r...

Consider the following parameters with regard to hydrogen like atoms:
(1). Energy of the atom
(2). Radius of electron orbit
(3) Spin of the electron
Which of the above are same for all hydrogen-like atoms and ions in n=1 state?

A

1 only

B

2 only

C

3 only

D

1 and 2

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The correct Answer is:
D
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