Mark Scheme (Results)
Summer 2023
Pearson Edexcel International GCSE
In Chemistry (4CH1) Paper 2C
, Question
Answer Notes Marks
number
1 (a) (i) silicon ALLOW Si 1
(ii) magnesium ALLOW Mg 1
(iii) bromine ALLOW mercury / Hg 1
ALLOW Br / Br2
REJECT bromide / Br−
(iv) 2,8,.8.5 ACCEPT diagram 1
showing electron
configuration
(v) Na2S ALLOW Na+2S2− 1
(b) An explanation that links the following two points 2
M1 full outer shell / 8 electrons in outer shell /
(electron configuration) 2.8
M2 (so) does not need to lose or gain (or share)
electrons / e(-)
Total 7
Summer 2023
Pearson Edexcel International GCSE
In Chemistry (4CH1) Paper 2C
, Question
Answer Notes Marks
number
1 (a) (i) silicon ALLOW Si 1
(ii) magnesium ALLOW Mg 1
(iii) bromine ALLOW mercury / Hg 1
ALLOW Br / Br2
REJECT bromide / Br−
(iv) 2,8,.8.5 ACCEPT diagram 1
showing electron
configuration
(v) Na2S ALLOW Na+2S2− 1
(b) An explanation that links the following two points 2
M1 full outer shell / 8 electrons in outer shell /
(electron configuration) 2.8
M2 (so) does not need to lose or gain (or share)
electrons / e(-)
Total 7
