(a(i))[1]
State what is meant by an $\alpha$-particle.
(a(ii))[2]
State two properties of $\alpha$-particles.
(b(i))[2]
Complete the nuclear equation for this reaction: $^{14}_{7}\text{N} + \; \ldots \; \alpha \; \rightarrow \; ^{17}_{8}\text{O} + \; \ldots$
(b(ii)1)[1]
The combined mass-energy of the nitrogen-14 nucleus and the $\alpha$-particle is smaller than the mass-energy of the particles produced in the reaction. The difference in mass-energy is $1.1\ \text{MeV}$. Suggest how mass-energy can still be conserved in this reaction.
(b(ii)2)[4]
Calculate the speed of an $\alpha$-particle having kinetic energy of $1.1\ \text{MeV}$.