(a(i))[2]
Fill in the table. Table headings: particle, relative charge, relative mass. The electron has relative mass $\frac{1}{1840}$. The proton has relative charge +1.
(a(ii))[2]
Fill in the table so it shows how many electrons, neutrons and protons are present in these magnesium isotopes.
(a(iii))[1]
Explain why magnesium ions carry a charge of $2+$.
(b)[3]
Give the formula of each particle below that has the same electronic structure as Mg$^{2+}$ ions: • a cation (positive ion) • an anion (negative ion) • an atom