(a(i))[1]
Give the symbol of the element that is present at approximately 78% in clean, dry air.
(a(ii))[1]
Give the symbol of the element whose atoms each have only three electrons in the outer shell.
(a(iii))[1]
Give the symbol of the element whose atoms each have only nine protons.
(a(iv))[1]
Give the symbol of the element that is found as graphite.
(a(v))[1]
Give the symbol of the element that is an alkali metal.
(a(vi))[1]
Give the symbol of the element that has an oxidation number of zero only.
(b(i))[2]
State the meaning of the term isotopes.
(b(ii))[2]
Calculate the relative atomic mass of boron, giving your answer to one decimal place.