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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Elementary structure of the atom

Jamb Physics Questions - Elementary structure of the atom

Question 1:
It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?
  • A An electron
  • B A \(\beta\)-particle
  • C An \(\alpha\)-particle
  • D A proton
  • E An atom
View Answer & Explanation
Question 2:
Which of the following statements is CORRECT? i. the mass number is equal to the total number of protons and electrons in an atom. ii. the atomic number is equal to the number of protons in an atom. iii. the number of electrons in an atom is equal to the total number of protons and neutrons in the nucleus.
  • A I only
  • B Ii only
  • C Iii only
  • D I and ii only
  • E Ii and iii only
View Answer & Explanation
Question 3:
What is the number of neutrons in the Uranium isotope \(^{238}_{92}X\)?
  • A 92
  • B 146
  • C 238
  • D 330
  • E 119
View Answer & Explanation
Question 4:
The number of neutrons contained in the nucleus \(^{238}_{92}U\) is
  • A 92
  • B 146
  • C 238
  • D 330
View Answer & Explanation
Question 5:
The binding energy of helium He is
4
2




[atomic mass of proton = 1.00783U,
atomic mass of neutron = 1.00867U]
  • A 4.033U
  • B 2.017U
  • C 0.033U
  • D 0.330U
View Answer & Explanation