all three answers are required for the mark oxygen • 1 (L7) fluorine • (ii) they contain only one type of atom or symbol or letter chlorine • 1 (L7) do not accept symbols 1 (L7) (b) any from two [5] CO2 • Q# 9/ M10. (a) (i) any one from accept C’ ‘O2 gold • CH4 • iron accept • ‘H4C’ magnesium NaCl • • 1 (L3) accept Na’ or ‘Cl ‘Na18Cl18’ do not accept names of compounds (ii) any one from 2 (L7) sulphur • (c) sodium chloride or salt do not accept phosphorus ‘NaCl’ • 1 (L7) 1 (L4) (d) carbon (iii) iron 1 (L7) 1 (L3) chlorine (iv) iron sulphide 1 (L5) do not accept ‘chloride’ 1 (L7) (b) magnesium sulphide copper do not accept sulphite’ ‘magnesium answers must be in the correct order or sulphate’ ‘magnesium 1 (L7) 1 (L5) [8] [5] Q# 10/ M11 (b) (i) P: phosphorus Q# 8/ M9. (a) the three columns on 1 K: potassium the left hand side 1 accept first three columns’ or on the left’ ‘the ‘ 1 (L7) (ii) K do not accept ‘potassium’ (b) Na 1 1 (L7) [4] Cl Q# 11/ M12. (a) (i) C 1 (L7) 1 (L7) (ii) D 1 (L7) (c) magnesium sulphide do not accept sulphite’ ‘magnesium (iii) A and B or sulphate’ ‘magnesium answers may be in either order 1 (L7) both answers are required for the mark 1 (L7) (d) any one from (iv) A and D hydrogen • answers may be in either order nitrogen • both answers are required for the mark
all three answers are required for the mark 1 (L7) (ii) they contain only one type of atom or symbol or letter 1 (L7) (b) any two from • CO2 accept ‘O2 C’ • CH4 accept ‘H4C’ • NaCl accept ‘Cl Na’ or ‘Na18Cl18’ do not accept names of compounds 2 (L7) (c) sodium chloride or salt do not accept ‘NaCl’ 1 (L7) (d) carbon 1 (L7) chlorine do not accept ‘chloride’ 1 (L7) copper answers must be in the correct order 1 (L7) [8] Q# 8/ M9. (a) the three columns on the left hand side accept ‘the first three columns’ or ‘ on the left’ 1 (L7) (b) Na 1 (L7) Cl 1 (L7) (c) magnesium sulphide do not accept ‘magnesium sulphite’ or ‘magnesium sulphate’ 1 (L7) (d) any one from • hydrogen • nitrogen • oxygen • fluorine • chlorine do not accept symbols 1 (L7) [5] Q# 9/ M10. (a) (i) any one from • gold • iron • magnesium 1 (L3) (ii) any one from • sulphur • phosphorus 1 (L4) (iii) iron 1 (L3) (iv) iron sulphide 1 (L5) (b) magnesium sulphide do not accept ‘magnesium sulphite’ or ‘magnesium sulphate’ 1 (L5) [5] Q# 10/ M11 (b) (i) P: phosphorus 1 K: potassium 1 (ii) K do not accept ‘potassium’ 1 [4] Q# 11/ M12. (a) (i) C 1 (L7) (ii) D 1 (L7) (iii) A and B answers may be in either order both answers are required for the mark 1 (L7) (iv) A and D answers may be in either order both answers are required for the mark
sec1_sci_c7p_eq_1st_60marks_atoms_and_elements_only_tbase_4students_12pgs_zz.docx