(ii) Zinc is more reactive than copper, so it displaces copper to form zinc nitrate. Zinc nitrate is colourless, and the brown solid is copper metal.
CIE IGCSE Chemistry Solved Past Paper May/June 2020 P42
CIE IGCSE Chemistry Solved Past Paper May/June 2020 P42
CIE IGCSE Chemistry Solved Past Paper May/June 2020 P41
CIE IGCSE Chemistry Solved Past Paper May/June 2020 P41
CIE IGCSE Chemistry Solved Past Paper Oct/Nov 2019 P41
CIE IGCSE Chemistry Solved Past Paper Oct/Nov 2019 P41
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P43
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P43
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P42
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P42
CIE IGCSE Chemistry Solved Past Paper May/June 2019 P41
1a) number of protons in the nucleus of an atom
b(i) 12 12 1 2
12 14 12
(ii) isotopes
(iii) because they have the same number of electrons in their outer shells
c) beryllium metal and chloride ion
d) 2,8,3