Subatomic ParticlesPractice Questions & MCQs
Practice Subatomic Particles questions from Atomic Foundations of Matter (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Subatomic ParticlesQuiz - Solve & Score
Q1. Which particle has negligible mass?
- A.electron
- B.proton
- C.neutron
- D.alpha particle
Answer: A. electron
Concept involved: The electron's mass is negligible (~1/1836 u). Picking the matching option: Correct. Hence the correct option is A) electron.
Q2. Which subatomic particle carries a negative charge and has negligible mass?
- A.the electron
- B.the proton
- C.the neutron
- D.the nucleus
Answer: A. the electron
Going back to the NCERT chapter, Apply Newton's second law F = m*a, which links force, mass and acceleration; substitute the given numerical values into this relation => the unknown reduces to a single number; hence the required answer = the electron. That fits the listed correct option directly - Correct. Looking at the others: option B) 'the proton' doesn't hold - The proton is positively charged, not negative; option C) 'the neutron' doesn't hold - The neutron has no charge. Hence the answer is A) the electron.
Q3. Which combination correctly lists the relative charges of proton, neutron and electron?
- A.+1, 0, -1
- B.-1, 0, +1
- C.0, +1, -1
- D.+1, -1, 0
Answer: A. +1, 0, -1
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