applicable to nitrogen: if any other each other 1 (L7) answer is above a mark cannot be the box almost full of particles of neon, more awarded for the second part than 50% of which any one from are touching each other 1 (L7) contains no oxygen • accept other jars all contain oxygen’ ‘the the particles are randomly arranged nitrogen is unreactive • accept does not support burning’ ‘nitrogen if the level of liquid is drawn then accept the 1 circles Q# 2/ M3. (a) correctly below the liquid level 1 (L7) Q# 4/ M5. (i) graphite If more than four lines are drawn, deduct one mark do not accept ‘C’ 1 (L7) for each incorrect line minimum mark zero (ii) calcite 4 (L4) do not accept ‘CaCO3’ 1 (L7) (b) answers may only be taken from the list in part (a) (iii) saltpetre good electrical conductor do not accept ‘KNO3’ 1 (L7) 1 (L4) (iv) gold or graphite melting point of 3422°C 1 (L4) do not accept or ‘Au’ ‘C’ answers may be in either order 1 (L7) accept electricity’ or ‘conducts ‘conductor’ Q# 5/ M6. (a) oxygen accept high melting or at high ‘ ‘solid 1 (L6) temperatures’ do not accept thermal conductor’ Q# 6/ M7. (a) ‘good [6] 4 (L6) Q# 3/ M4 (a) (c) (i) gas all six formulae are required for the mark 1 (L6) 1 (L7) (ii) liquid (b) 1 (L6) all six formulae are required for the mark (iii) solid 1 (L7) 1 (L6) [8] (c) Ne or neon 1 (L7) (d) up to ten randomly arranged particles spaced throughout the box Q# 7/ M8. (a) (i) 1 accept ‘C’ accept just one particle do not accept an empty box 3 1 (L7) accept ‘O’ most of the particles are not in contact with
applicable to nitrogen: if any other answer is above a mark cannot be awarded for the second part any one from • contains no oxygen accept ‘the other jars all contain oxygen’ • nitrogen is unreactive accept ‘nitrogen does not support burning’ 1 Q# 2/ M3. (a) If more than four lines are drawn, deduct one mark for each incorrect line minimum mark zero 4 (L4) (b) answers may only be taken from the list in part (a) good electrical conductor 1 (L4) melting point of 3422°C 1 (L4) answers may be in either order accept ‘conducts electricity’ or ‘conductor’ accept ‘ high melting or ‘solid at high temperatures’ do not accept ‘good thermal conductor’ [6] Q# 3/ M4 (a) all six formulae are required for the mark 1 (L7) (b) all six formulae are required for the mark 1 (L7) (c) Ne or neon 1 (L7) (d) up to ten randomly arranged particles spaced throughout the box accept just one particle do not accept an empty box 1 (L7) most of the particles are not in contact with each other 1 (L7) the box almost full of particles of neon, more than 50% of which are touching each other 1 (L7) the particles are randomly arranged if the level of liquid is drawn then accept the circles correctly below the liquid level 1 (L7) Q# 4/ M5. (i) graphite do not accept ‘C’ 1 (L7) (ii) calcite do not accept ‘CaCO3’ 1 (L7) (iii) saltpetre do not accept ‘KNO3’ 1 (L7) (iv) gold or graphite do not accept ‘Au’ or ‘C’ 1 (L7) Q# 5/ M6. (a) oxygen 1 (L6) Q# 6/ M7. (a) 4 (L6) (c) (i) gas 1 (L6) (ii) liquid 1 (L6) (iii) solid 1 (L6) [8] Q# 7/ M8. (a) (i) 1 accept ‘C’ 3 accept ‘O’
sec1_sci_c7p_eq_1st_60marks_atoms_to_mixtures_tbase_4students.docx