Mark Scheme (Results) June 2010

Mark Scheme (Results) June 2010

GCE

GCE Chemistry (6CH01/01)

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Summer 2010

Publications Code US023629

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6CH01_01 1006

Section A (multiple choice)

Question Number 1 (a)

Correct Answer B

Question Number 1 (b)

Correct Answer D

Question Number 2

Correct Answer D

Question Number 3

Correct Answer A

Question Number 4 (a)

Correct Answer B

Question Number 4(b)

Correct Answer D

Question Number 4 (c)

Correct Answer C

Question Number 4 (d)

Correct Answer A

Question Number 5

Correct Answer B

Question Number 6

Correct Answer A

Question Number 7

Correct Answer C

Question Number 8

Correct Answer D

Question Number 9

Correct Answer C

Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1

6CH01_01 1006

Question Number 10

Question Number 11

Question Number 12

Question Number 13

Question Number 14 (a)

Question Number 14 (b)

Question Number 14 (c)

Correct Answer C Correct Answer D Correct Answer B Correct Answer D Correct Answer B Correct Answer A Correct Answer C

Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1 Mark 1

6CH01_01 1006

Section B

Question Acceptable Answers Number

15 (a)(i)

Reject

Mark 2

electrons (1) charge (1) square brackets not essential

Mark independently

Ignore (labelling of) nucleus unless incorrect

Question Acceptable Answers Number 15 (a)(ii) 1s22s22p63s23p6

Allow electron number as sub script

Allow orbitals as capital letters Allow TE from (a) (i) if Ca atom or Ca+ ion

Reject

Mark 1

Question Acceptable Answers Number

Reject

Mark

15 (a)(iii) Smaller

2

Because it has one less (sub) shell of electrons bigger scores

/ orbital / energy level / less shielding (1)

zero

And the ratio of protons : electrons has increased / more protons than electrons / greater net force on remaining electrons (so remainder of electrons held more closely) / greater effective nuclear charge (1)

greater nuclear charge /positive charge

6CH01_01 1006

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