Q105 · CSIR-NET Chemistry, December 2013

Paper: CSIR-NET December 2013 · Subject: Physical Chemistry · Chapter: Quantum Chemistry · Topic: Hydrogen Atom · Marks: 2 · Difficulty: Medium

The most probable value of 'r' for an electron in 1s orbital of hydrogen atom is

(a)$a_{0} / 2$

(b)$a_{0}$

(c)$\sqrt{2} a_{0}$

(d)$3 a_{0} / 2$

Answer

Answer: B ✓ checked by 4AB · confidence high

The source book printed no answer; this one was worked out and checked — see the explanation.

Explanation

The radial distribution 4πr²|ψ₁ₛ|² peaks at r = a₀ (Bohr radius); the mean value is 1.5a₀.

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