Atomic Structure (F)

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1/10 Questions

For which species Bohr's theory does not apply?
- H
- He⁺
- Li²⁺
- Be

About This Quiz

Questions and Answers

2.

From discharge tube experiments it is concluded that:
- Mass of a proton is in fraction
- Matter contained electron
- Nucleus contains positive charge
- Positive rays are heavier than proton
Correct Answer

A. Matter contained electron
3.

When an electron of charge 'e' and mass 'm' moves with velocity 'v' about the nuclear charge Ze in a circular orbit of radius 'r', the P.E. of electron is given by
- Ze²/r
- -Ze²/r
- Ze²/r²
- Mv²/r
Correct Answer

A. -Ze²/r
4.

Which of the following does not tell about shells of an atom?
- Principle quantum number , n
- Azimuthal quantum number, l
- Magnetic quantum number, m
- Spin quantum number, s
Correct Answer

A. Principle quantum number , n
5.

The electronic configuration of species M²⁺ is 1s², 2s², 2p⁶, 3s², 3p6,3d⁶ and its atomic weight is 56 amu, the number of neutron in the nucleus of species M is
- 20
- 26
- 28
- 30
Correct Answer

A. 30
6.

The energy of an electromagnetic radiation 3 × 10^-12 ergs. What is its wave length in nano meter
- 400
- 228.3
- 3000
- 662.5
Correct Answer

A. 228.3
7.

Which of the following configuration is not correct according to Hund's rule?
- A
- B
- C
- Option 4
Correct Answer

A. B
8.

Which one of the following statement is not correct?
- Rydberg's constant and wave number have same unit
- Lyman series of hydrogen spectrum occurs in the ultraviolet region.
- The angular movement of the electron in the ground state of hydrogen atom is equal to h/2𝝅
- The radius of first Bohr orbit of hydrogen atom is 2.116 ×10⁸ cm.
Correct Answer

A. The radius of first Bohr orbit of hydrogen atom is 2.116 ×10⁸ cm.
9.

Which one of the following is not isoelectronic pair?
- Mg²⁺, Be²⁺
- N^3-, O^2-
- N^3-, F^-
- F^1-, Al³⁺
Correct Answer

A. Mg²⁺, Be²⁺
10.

The third line in Balmer sereis corresponds to an electronic transfer between which Bohr's orbit in hydrogen.
- 5 → 3
- 5 → 2
- 4 → 3
- 4 → 2
Correct Answer

A. 5 → 2

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Current Version
Jun 15, 2021

Quiz Edited by
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Jun 15, 2021

Quiz Created by
Zafar Iqbal

Atomic Structure (F)

For which species Bohr's theory does not apply?

From discharge tube experiments it is concluded that:

When an electron of charge 'e' and mass 'm' moves with velocity 'v' about the nuclear charge Ze in a circular orbit of radius 'r', the P.E. of electron is given by

Which of the following does not tell about shells of an atom?

The electronic configuration of species M2+ is 1s2, 2s2, 2p6, 3s2, 3p6,3d6 and its atomic weight is 56 amu, the number of neutron in the nucleus of species M is

The energy of an electromagnetic radiation 3 × 10-12 ergs. What is its wave length in nano meter

Which of the following configuration is not correct according to Hund's rule?

Which one of the following statement is not correct?

Which one of the following is not isoelectronic pair?

The third line in Balmer sereis corresponds to an electronic transfer between which Bohr's orbit in hydrogen.

The electronic configuration of species M²⁺ is 1s², 2s², 2p⁶, 3s², 3p6,3d⁶ and its atomic weight is 56 amu, the number of neutron in the nucleus of species M is

The energy of an electromagnetic radiation 3 × 10^-12 ergs. What is its wave length in nano meter