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Jun 13 MS.pdf


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Mark Scheme – General Certificate of Education (A-level) Chemistry – Unit 1: Foundation Chemistry – June 2013

1(d)

1(e)

1(f)

70

1

If M1 incorrect or blank CE = 0/2
Ignore symbols and charge even if wrong.

Lowest mass / lowest m/z

1

Accept lightest.
Accept fewest neutrons.

Electron(s) transferred / flow (at the detector)

1

(From detector / plate) to the (+) ion

1

M1 must refer to electron flow at the detector.
If M1 incorrect CE = 0/2
Do not allow from a charged plate.

They do not have the same electron configuration / they
have different number of electrons (in the outer shell)

1

4

Ignore electrons determine the properties of an atom.
Ignore they are different elements or different number of
protons.