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In which of the following systems will t...

In which of the following systems will the radius of the first orbit (n=1) be minimum?

A

Single ionised helium

B

Deuteron atom

C

Hydrogen atom

D

Doubly ionised lithium

Text Solution

Verified by Experts

The correct Answer is:
D
`r propto 1/Z`. For doubly ionised lithium, Z = 3
`therefore` r will be minimum.
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