alleryAn alpha particle emitted during radioactive decay consists of:
AOne proton, one neutron
BTwo electrons only
CFour pure protons
DTwo protons, 2 neutrons
Answer & Solution
Correct answer: D. Two protons, 2 neutrons
An alpha particle is identical to a helium nucleus composed of two protons and two neutrons.
Keep practising Atomic Structure
Browse all Atomic Structure questions for ICSE Class 9, or explore more Chemistry topics.
Related questions
Match each element with its electron configuration (K, L, M, N):Match each nuclear species term with its scientific definition:Match each subatomic particle with its discoverer:Match each atomic model with its historical discoverer and feature:Atoms generally react chemically with one another in order to:An element possessing only a single stable isotope is described as:When an excited electron drops to a lower energy level, it emits a:Which fundamental force attracts electrons to the atomic nucleus?