(a)[2]
What is meant by isotopes?
(b(i))[1]
For a uranium-238 nucleus, state how many protons it has.
(b(ii))[1]
For a uranium-238 nucleus, state how many neutrons it has.
(c(i))[2]
A uranium-238 nucleus has a radius of $8.9 \times 10^{-15}\,\text{m}$. Calculate, for a uranium-238 nucleus, its mass.
(c(ii))[2]
Calculate, for a uranium-238 nucleus, its mean density.
(d)[2]
A lump of uranium has a density of $1.9 \times 10^{4}\,\text{kg m}^{-3}$. Using your answer to (c)(ii), suggest what can be inferred about the structure of the atom.