6 questions · timed · auto-graded
A neutron is used in nuclear fission for bombardment.
α - particles
β - particles
X - rays
γ - radiations
β-particles are negatively charged, so they get deflected by the electric and magnetic fields. The deflection of β-particle is more than that of a-particle since a β-particle is lighter than the α-particle. Whereas, gamma radiations are not deflected by the electric and magnetic fields since they are not charged particles.
An α - particle rapidly loses its energy as it moves through a medium and therefore its penetrating power is quite small. It can penetrate only through 3 - 8 cm in air. It can easily be stopped by a thin card sheet or a thick paper.
Hint: Radioactivity is a nuclear phenomenon. Hence, electrons come out from the nucleus. Electron is created as a result of decay of one neutron into a proton inside the nucleus and it is not possible for the electron to stay inside the nucleus; thus, it is spontaneously emitted.
Hint: In a single radioactive decay, α and β articles are never emitted simultaneously. There will be either an α- emission or a β - emission, which may be accompanied by γ emission.