(a)[2]
State the meaning of the binding energy of a nucleus.
(b(i))[2]
State what isotopes mean.
(b(ii))[2]
Complete Fig. 9.1 by adding the missing value.
(c(i))[1]
Uranium-235 has a half-life of $7.1 \times 10^8\,\text{years}$. Show that the decay constant $\lambda$ for uranium-235 is $3.1 \times 10^{-17}\,\text{s}^{-1}$.
(b)
The data for two uranium isotopes are shown in Fig. 9.1.
(c)
The half-life of uranium-235 is $7.1 \times 10^8$ years.
(c(ii))[3]
A uranium-235 sample has an activity of $5.0 \times 10^3\,\text{Bq}$. Calculate the mass of the sample.