Pearson Edexcel International GCSE (9–1) Thursday 14 January 2021



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Pearson Edexcel

International GCSE (9¨C1)

Centre Number

Candidate Number

Thursday 14 January 2021

Morning (Time: 1 hour 15 minutes)

Paper Reference 4CH1/2C

Chemistry

Unit: 4CH1

Paper 2C

You must have:

Calculator, ruler

Total Marks

Instructions

black ink or ball?point pen.

? Use

Fill in the boxes at the top of this page with your name,

? centre

number and candidate number.

Answer

? Answer allthequestions.

in the spaces provided

? ¨C there may bequestions

more space than you need.

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

.

Information

total mark for this paper is 70.

? The

The

for each question are shown in brackets

? ¨C usemarks

this as a guide as to how much time to spend on each question.

Advice

each question carefully before you start to answer it.

? Read

to answer every question.

? Try

Check

? your answers if you have time at the end.

Turn over

P67081A

?2021 Pearson Education Ltd.

1/1/1/1/

*P67081A0124*

2

40

Ca

39

K

88

Sr

85

Rb

137

Ba

133

Cs

[226]

Ra

[223]

Fr

*P67081A0224*

88

radium

89

actinium

[227]

Ac*

57

lanthanum

139

La*

39

yttrium

89

Y

21

scandium

45

Sc

name

104

rutherfordium

[261]

Rf

72

hafnium

178

Hf

40

zirconium

91

Zr

22

titanium

48

Ti

105

dubnium

[262]

Db

73

tantalum

181

Ta

41

niobium

93

Nb

23

vanadium

51

V

106

seaborgium

[266]

Sg

74

tungsten

184

W

42

molybdenum

96

Mo

24

chromium

52

Cr

atomic (proton) number

relative atomic mass

atomic symbol

Key

107

bohrium

[264]

Bh

75

rhenium

186

Re

43

technetium

[98]

Tc

25

manganese

55

Mn

iron

108

hassium

[277]

Hs

76

osmium

190

Os

44

ruthenium

101

Ru

26

56

Fe

1

hydrogen

1

H

109

meitnerium

[268]

Mt

77

iridium

192

Ir

45

rhodium

103

Rh

27

cobalt

59

Co

110

darmstadtium

[271]

Ds

78

platinum

195

Pt

46

palladium

106

Pd

28

nickel

59

Ni

gold

111

roentgenium

[272]

Rg

79

197

Au

47

silver

108

Ag

29

copper

63.5

Cu

zinc

81

thallium

204

Tl

49

indium

115

In

31

gallium

70

Ga

tin

lead

82

207

Pb

50

119

Sn

32

germanium

73

Ge

14

silicon

28

Si

6

carbon

12

C

4

83

bismuth

209

Bi

51

antimony

122

Sb

33

arsenic

75

As

15

phosphorus

31

P

7

nitrogen

14

N

5

84

polonium

[209]

Po

52

tellurium

128

Te

34

selenium

79

Se

16

sulfur

32

S

8

oxygen

16

O

6

85

astatine

[210]

At

53

iodine

127

I

35

bromine

80

Br

17

chlorine

35.5

Cl

9

fluorine

19

F

7

The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.

0

86

radon

[222]

Rn

54

xenon

131

Xe

36

krypton

84

Kr

18

argon

40

Ar

10

neon

20

Ne

2

helium

4

He

Elements with atomic numbers 112¨C116 have been reported but not fully

authenticated

80

mercury

201

Hg

48

cadmium

112

Cd

30

65

Zn

13

aluminium

27

Al

5

boron

11

B

3

* The lanthanoids (atomic numbers 58¨C71) and the actinoids (atomic numbers 90¨C103) have been omitted.

87

francium

56

barium

55

caesium

38

strontium

37

rubidium

20

calcium

19

potassium

12

magnesium

11

sodium

4

24

Mg

3

23

Na

9

Be

beryllium

2

lithium

7

Li

1

The Periodic Table of the Elements





BLANK PAGE

*P67081A0324*

3

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Answer ALL questions. Write your answers in the spaces provided.

1 The diagram shows an atom of an element.

Y

++

+

(a) (i) What is the name of the particle labelled Y?

(1)

A electron

B ion

C neutron

D proton

(ii) Give the mass number of this atom.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(iii) Name this element.

Use the Periodic Table on page 2 to help you.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) There are two isotopes of this element.

Give one way, in terms of sub-atomic particles, that these isotopes are the same

and one way that they are different.

(2)

same .. ................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

different .. ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Total for Question 1 = 5 marks)

4

*P67081A0424*



2 This question is about gases.

(a) The box gives the names of some gases.

argon?????carbon dioxide?????hydrogen?????nitrogen?????oxygen

Use gases from the box to answer these questions.

Each gas may be used once, more than once or not at all.

(i) Name the most abundant gas in the Earth¡¯s atmosphere.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(ii) Name the gas that is a compound.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(iii) Name the least reactive of the gases.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(iv) Name the gas formed by the complete combustion of hydrocarbons.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(b) Describe the test for hydrogen gas.

(1)

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Total for Question 2 = 5 marks)

*P67081A0524*

5

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