+91-8527521718
Signup | Login
Select Chapter Topics:
filter
Q. No.
Millikan’s Oil drop Method was used to determine:

1. Neutron
2. Alpha particle
3. Positron
4. Charge on the electrons
Subtopic:  Introduction of Atomic Structure |
 84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following best explains the phenomenon of diffraction of electrons? 

1. Pauli exclusion principle 
2. Hund's rule 
3. The wave properties of matter 
4. Heisenberg uncertainty principle 
Subtopic:  Introduction of Atomic Structure |
 84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.

When the atoms of gold sheet are bombarded with a beam of α -particles, only a few alpha-particles get deflected where as most of them go straight undeflected. This is because:

1. The force of attraction on the α-particles by the oppositely charged electron is not sufficient.
2. The nucleus occupies much smaller volume as compared to the volume of atom.
3. The force of repulsion on fast moving α-particles is very small.
4. The neutrons in the nucleus do not have any effect on α-particles.

Subtopic:  Introduction of Atomic Structure |
 83%
Level 1: 80%+
Hints
advertisementadvertisement

Which of the following statements about an electron is/are correct?

(a) It has a negative charge and is lighter than a proton.
(b) It has a negative charge and is heavier than a proton.
(c) Its position is less fixed than that of a proton.
(d) Its position is more fixed than that of a proton.
 
1. (a) only 2. (a) and (c)
3. (b) and (d) 4. (c) only
Subtopic:  Introduction of Atomic Structure |
 83%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Identify pair of symbols represents nuclei that have the same number of neutrons.

1. \({ }_{26}^{56} \mathrm{Fe}\text{ and }{ }_{28}^{58} \mathrm{Ni} \)
2. \({ }_{26}^{58} \mathrm{Fe}\text{ and }{ }_{26}^{56} \mathrm{Fe}^{2+} \)
3. \({ }_{27}^{57} \mathrm{Co}\text{ and }{ }_{28}^{57} \mathrm{Ni} \)
4. \({ }_{28}^{57} \mathrm{Ni}\text{ and }{ }_{28}^{58} \mathrm{Ni} \)
Subtopic:  Number of Electron, Proton & Neutron |
 91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.

Identify the pairs which are not isotopes?

(a) \(_{6}^{12}X, \ _{6}^{13}Y\)

(b) \(_{17}^{35}X, \ _{17}^{37}Y\)

(c) \(_{6}^{14}X, \ _{7}^{14}Y\)

(d) \(_{4}^{8}X, \ _{5}^{8}Y\)

1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)

Subtopic:  Number of Electron, Proton & Neutron |
 90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
advertisementadvertisement

Which of the following statements about the electron is incorrect?

1. It is a negatively charged particle.
2. The mass of electron is equal to the mass of neutron.
3. It is a basic constituent of all atoms. ​​​
4. It is a constituent of cathode rays.
Subtopic:  Number of Electron, Proton & Neutron |
 90%
Level 1: 80%+
Hints

Determine the identity of a species if it has 16 protons, 18 electrons, and 16 neutrons:

1. \(S^{-}\) 2. \(Si^{2+}\)
3. \(P^{3-}\) 4. \(\mathrm{S}^{2-}\)
Subtopic:  Number of Electron, Proton & Neutron |
 90%
Level 1: 80%+
Please attempt this question first.
Hints
Element X is found in two forms : 90.0% is an isotope that has a mass of 20.0 and 10.0% is an isotope that has a mass of 22.0 What is the atomic mass of element X?
1. 20.1 
2. 20.2 
3. 20.8
4. 21.2
Subtopic:  Number of Electron, Proton & Neutron |
 90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
advertisementadvertisement

 In \(_{35}^{80}Br\),  the number of protons, neutrons, and electrons are:

1. 25, 45, 45

2. 35, 45, 35

3. 45, 45, 35

4. 80, 35, 35

Subtopic:  Number of Electron, Proton & Neutron |
 89%
Level 1: 80%+
Hints
Select Chapter Topics:
filter
Q. No.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions

© 2026 GoodEd Technologies Pvt. Ltd.