(a(i))[1]
the compound made by the thermal decomposition of calcium carbonate
(a(ii))[1]
a positive ion that produces a blue-green colour in a flame test
(a(iii))[1]
an element that is used as a fuel
(a(iv))[1]
the monomer from which poly(ethene) is produced
(a(v))[1]
an ion produced when an atom gains an electron
(b)[2]
Complete the table so that the relative charges of a proton, a neutron and an electron are shown.
(c)[2]
Choose the two statements that are correct about nitrogen. Tick (✓) two boxes. Nitrogen molecules consist of single atoms. Every nitrogen atom has seven protons. Nitrogen atoms cannot be broken down into simpler substances by chemical means. Every nitrogen atom has 14 neutrons. Nitrogen makes up 21% of clean, dry air.