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• For the question marked with an asterisk (*), marks will be awarded for your ability to
structure your answer logically showing the points that you make are related or follow
• on from each other where appropriate.A Periodic Table is printed on the back cover of
this paper.
Advice
••• Read each question carefully before you start to answer it.Check your answers
if you have time at the end.Good luck with your examination.
Turn
P65463A
over *P65463A0128*
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Answer ALL questions.
Some questions must be answered with a cross in a box .
If you change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 This is a question about atoms, isotopes and ions.
(a) Which of the following pairs of ions is isoelectronic?
(1)
3– –
A N and Cl
B O2– and S2–
C Na+ and K+
D Na+ and Mg2+
(b) Which is a correct definition of relative isotopic mass?
(1) A
the weighted mean mass of an atom of an element relative to one twelfth of the mass of an atom
of the isotope carbon-12
B the mass of one atom of an isotope relative to one twelfth of the mass of an atom of the
isotope carbon-12
C the weighted mean mass of an atom of an element relative to 12 g of the isotope carbon-
12
2
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D the mass of one atom of an isotope relative to the mass of 12 g of the isotope carbon-12 3
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Downloaded by: Andrewkin |
4
• For the question marked with an asterisk (*), marks will be awarded for your ability to
structure your answer logically showing the points that you make are related or follow
• on from each other where appropriate.A Periodic Table is printed on the back cover of
this paper.
Advice
••• Read each question carefully before you start to answer it.Check your answers
if you have time at the end.Good luck with your examination.
Turn
P65463A
over *P65463A0128*
©2021 Pearson Education Ltd.
1/1/1/1/1/
Downloaded by: Andrewkin |
Distribution of this document is illegal
, Stuvia.com - The Marketplace to Buy and Sell your Study Material
Answer ALL questions.
Some questions must be answered with a cross in a box .
If you change your mind about an answer, put a line through the box and
then mark your new answer with a cross .
1 This is a question about atoms, isotopes and ions.
(a) Which of the following pairs of ions is isoelectronic?
(1)
3– –
A N and Cl
B O2– and S2–
C Na+ and K+
D Na+ and Mg2+
(b) Which is a correct definition of relative isotopic mass?
(1) A
the weighted mean mass of an atom of an element relative to one twelfth of the mass of an atom
of the isotope carbon-12
B the mass of one atom of an isotope relative to one twelfth of the mass of an atom of the
isotope carbon-12
C the weighted mean mass of an atom of an element relative to 12 g of the isotope carbon-
12
2
, Stuvia.com - The Marketplace to Buy and Sell your Study Material
D the mass of one atom of an isotope relative to the mass of 12 g of the isotope carbon-12 3
, Stuvia.com - The Marketplace to Buy and Sell your Study Material
Downloaded by: Andrewkin |
4
