(a(i))[1]
State which of P, Q, R, S and T is the ionised atom.
(a(ii))[1]
State the magnitude and sign of the charge on the ionised atom.
(b)[1]
State which pair from P, Q, R, S and T are isotopes of the same element.
(c(i))[1]
Deduce which atom decays in this way.
(c(ii))[1]
Deduce which atom is the product of this decay.
(c(iii))[1]
Deduce which type of radioactive decay occurs.
(c(iv))[3]
The half-life of this radioactive decay is $33$ years. Determine what fraction of the atoms will decay in $99$ years.