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Which state of triply ionised Beryllium ...

Which state of triply ionised Beryllium `(Be^(+++))` the same orbital radius as that of the ground state hydrogen ?

A

1

B

2

C

3

D

4

Text Solution

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The correct Answer is:
A
`z = 84" " r rArr r_(0) xx (n^(2))/(z)`
`N = ? " "n^(2) = z`
`N = 2`
So first excited state
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