Question

A neutron breaks down to form ?
A. A proton and an electron
B. Two protons
C. A helium nucleus
D. An alpha particle


What particle decomposes to produce the electron of beta radiation?
A. Electron
B. Neutron
C. Proton
D. Positron


What is the change in atomic mass when an atom emits gamma radiation?
A. Mass increases by 1
B. Mass decreases by 1
C. Mass remains the same
D. Mass decreases by 2

What is the change in the atomic number when an atoms emits an alpha particle?
A. Increases by 2
B. Increases by 1
C. Decreases by 4
D. Decreases by 2

Answer 1

A neutron breaks down to form a proton and an electron.
Change in atomic mass when an atom emits gamma radiation. The gamma radiation consists of photons which have no mass so the mass would remain the same. 
Re the change in atomic number when an atom emits an alpha particle it loses two protons and two neutrons so the atomic number drops by 2.