(a)[2]
State the meaning of a covalent bond.
(b(i))[2]
State the meaning of (I) in the name chlorine(I) oxide.
(b(ii))[3]
Complete the dot-and-cross diagram in Fig. 2.1 for a molecule of chlorine(I) oxide. Show outer electrons only.
(b(iii))[3]
Explain, in terms of structure and bonding, why $\text{Cl}_2\text{O}$ boils at a low temperature and does not thermally decompose into its constituent elements, $\text{Cl}_2$ and $\text{O}_2$.
(b(iv))[2]
Give two reasons why liquid $\text{Cl}_2\text{O}$ conducts electricity poorly.
(c(i))[1]
Name a giant covalent carbon structure that conducts electricity.
(c(ii))[1]
Identify the particles that carry electricity in this covalent carbon structure.
(c(iii))[2]
Complete Fig. 2.2 by adding the symbol for each of the 9 atoms shown.