Question
Which statement about α-particles and β-particles is correct?
α-particles are less ionising than β-particles.
α-particles are more penetrating than β-particles.
α-particles have greater mass than β-particles.
α-particles have the same charge as β-particles.
Answer/Explanation
Ans: C
Alpha particles have 2 neutrons and 2 protons. They have a very very high mass, higher than the Beta particles.
Because of the high mass of the alpha particles, they have a very low penetrating power.
Question
A radioactive nucleus emits either an α-particle or a β-particle.
What are the products of these two types of radioactive emission?
| product after α-emission | product after β-emission |
A | a nucleus of a different element | a nucleus of a different element |
B | a nucleus of a different element | a nucleus of the same element |
C | a nucleus of the same element | a nucleus of a different element |
D | a nucleus of the same element | a nucleus of the same element |
Answer/Explanation
Ans: A