The graph between $|\psi|^{2}$ and r(radial distance) is shown below. This represents:

JEE Main · 2019 · 10 Apr 2019 · Shift 1 · Atomic Structure

The graph between

∣ ψ ∣^{2}

and r(radial distance) is shown below. This represents:

Answer: (C)

A plot of

∣ ψ ∣^{2}

against

r

for an

s

-orbital starts from a maximum at the nucleus. The number of radial nodes is

n - ℓ - 1

, which for a

2 s

orbital is

2 - 0 - 1 = 1

. The curve shown touches zero once between its peaks, the single radial node that marks a

2 s

orbital;

1 s

would show none and

3 s

would show two.

JEE Main · 2019 · 10 Apr 2019 · Shift 1 · Single correct option