(a)[5]
Describe this carbon atom in terms of the locations of the electrons, neutrons and protons in the atom; the numbers of neutrons and protons; and the electronic configuration.
(b(i))[2]
Complete the symbol equation for the incomplete combustion of carbon so that carbon monoxide is formed. $\ldots\,\text{C} + \text{O}_2 \rightarrow \ldots\,\text{CO}$
(b(ii))[1]
State one harmful effect of carbon monoxide.
(c)[1]
Deduce the molecular formula of chromium carbonyl.
(d)[2]
Complete Table 5.1 to work out the relative molecular mass of Na$_2$Cr$_2$C$_{10}$O$_{10}$.
(e)[1]
Describe how this equation shows that chromium(III) oxide is reduced.