Structure of Atom (Class 11 — ~20% weight)
Bohr model, quantum numbers, orbital shapes, Aufbau principle, electron configuration.
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Take a full mock →Q1 · Structure of Atom (Class 11 — ~20% weight) · EASY
According to Bohr's model, the angular momentum of an electron in the nth orbit of a hydrogen atom is given by nh/(2π), where h is Planck's constant. If an electron is in the third orbit (n = 3), what is its angular momentum in terms of h?
Q2 · Structure of Atom (Class 11 — ~20% weight) · MEDIUM
An electron in an atom has the following set of quantum numbers: n = 3, l = 2, m = -1, s = +1/2. Which of the following statements about this electron is correct?
Q3 · Structure of Atom (Class 11 — ~20% weight) · HARD
The electronic configuration of chromium (atomic number 24) is [Ar] 3d⁵ 4s¹ instead of the expected [Ar] 3d⁴ 4s². This exception to the Aufbau principle occurs because:
Q4 · Structure of Atom (Class 11 — ~20% weight) · MEDIUM
Calculate the wavelength (in nm) of light emitted when an electron in a hydrogen atom transitions from n = 3 to n = 1. (Rydberg constant Rₕ = 1.097 × 10⁷ m⁻¹)