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Atomic Structure Basics
JEE Chemistry • 10 questions • Free on ExamBattle
Practice Questions
Q1
The maximum number of electrons in a shell with principal quantum number n is:
- A. n²
- B. 2n²
- C. 2n
- D. n
Q2
The Bohr radius of the hydrogen atom is approximately:
- A. 0.529 Å
- B. 1.058 Å
- C. 0.1 Å
- D. 5.29 Å
Q3
The azimuthal quantum number l for a 3d orbital is:
- A. 0
- B. 2
- C. 1
- D. 3
Q4
According to Aufbau principle, electrons fill orbitals in order of:
- A. Decreasing energy
- B. Increasing (n+l) value
- C. Increasing n only
- D. Increasing l only
Q5
The electronic configuration of Cu (Z=29) is:
- A. [Ar] 3d⁹ 4s²
- B. [Ar] 3d¹⁰ 4s¹
- C. [Ar] 3d⁸ 4s²
- D. [Ar] 3d¹⁰ 4s²
Q6
Heisenberg's uncertainty principle states that we cannot simultaneously determine:
- A. Mass and velocity
- B. Position and momentum
- C. Energy and mass
- D. Spin and charge
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