Structure of Atoms NDA Questions

NDA Chemistry

Structure of Atoms MCQ Questions


1.

The radius of the hydrogen atom according to Bohr’s model is__________

A.

533 × 10⁻¹⁰ m

B.

5.3 × 10⁻¹¹ m

C.

5.3 × 10⁻¹⁰ m

D.

53 × 10⁻¹² m

😑 View Answer Rough Work Error
ANSWER :

B. 5.3 × 10⁻¹¹ m

2.
The quantum number that determines the shape of an orbital is called__________
A.
Azimuthal quantum number
B.
Principal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
😑 View Answer Rough Work Error
ANSWER :
A. Azimuthal quantum number
3.
Which of the following is not true about the Bohr model of the atom?
A.
The orbits are circular
B.
Electrons move in elliptical orbits
C.
The energy of electron is quantized
D.
It explains the hydrogen atom spectrum
😑 View Answer Rough Work Error
ANSWER :
B. Electrons move in elliptical orbits
4.
The uncertainty principle, which states that it is impossible to simultaneously know both position and momentum of an electron, was proposed by__________
A.
Werner Heisenberg
B.
Niels Bohr
C.
Albert Einstein
D.
Louis de Broglie
😑 View Answer Rough Work Error
ANSWER :
A. Werner Heisenberg
5.
Which of the following correctly represents the number of electrons in the second shell of an atom?
A.
4
B.
6
C.
8
D.
2n², where n = 2
😑 View Answer Rough Work Error
ANSWER :
C. 8
6.
According to the Pauli exclusion principle, the maximum number of electrons that can occupy a given orbital is__________
A.
2
B.
3
C.
4
D.
1
😑 View Answer Rough Work Error
ANSWER :
A. 2