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

In Which Of The Following Systems Will The Radius Of Physics QuestionIn Which Of The Following Systems Will The Radius Of Physics Question

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

Options

(a) Single ionised helium
(b) Deutron atom
(c) Hydrogen atom
(d) Doubly ionised lithium

Correct Answer:

Doubly ionised lithium

Explanation:

r ∝ 1 / Z. For doubly ionised lithium, Z = 3
.·. r will be minimum.

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