(a)[2]
Complete Table 2.1 to show how many protons and neutrons are in one atom of $^{40}_{18}\mathrm{Ar}$.
(b(i))[1]
Explain the meaning of monatomic.
(b(ii))[1]
Explain why argon does not react, using electronic configuration in your answer.
(c)[2]
Complete Table 2.2 to fill in the missing information.