CC3/4 End of Unit Test

CC3/4

© Pearson Education Ltd 2019. Copying permitted for purchasing institution only. This material is not copyright free.

1

End of Unit Test Higher

Name Class Date

1 a Boron has two isotopes, boron-10 and boron-11.

Figure 1 shows information about boron-10 and boron-11.

Complete Figure 1 by filling in the missing information.

Isotope Atomic number

Mass number

Number of:

protons neutrons electrons

boron-10 5 10 5 5

boron-11 5 11 5 5

Figure 1

(2)

b Describe what is meant by the term isotope.

Refer to protons and neutrons in your description.

(3)

c Boron and aluminium are both found in group 3 of the modern periodic table.

i State what this tells you about the electronic configuration of both elements.

(1)

ii Explain what this tells you about the chemical properties of the two elements.

(1)

(Total for Question 1 = 7 marks)

CC3/4


2


2 Figure 2 shows part of the periodic table published by Dmitri Mendeleev in 1869.

Figure 2

a Identify the physical property Mendeleev used to order the elements in Figure 2.

Tick one box.

A atomic number

B electronic configuration

C relative atomic mass

D number of protons

(1)

b Mendeleev left gaps in his periodic table.

He put question marks in these gaps.

For example, there are question marks for the elements with relative atomic masses 68 and 70 in Figure 2.

i Explain why Mendeleev left gaps in his periodic table.

(1)

ii State how Mendeleev was able to predict the properties of the missing elements before they were discovered.

(1)

iii State the changes Mendeleev made to how he organised the elements to make his ideas work.

(1)

H ═ 1

Li ═ 7

Be ═ 9,4

Si ═ 28P ═ 31S ═ 32

Cl ═ 35,5K ═ 39

Ca ═ 40? ═ 45

?Er ═ 56?Yt ═ 60?In ═ 75,6

Al ═ 27,4Mg ═ 24

Ti ═ 50 Zr ═ 90 ? ═ 180Ta ═ 182W ═ 186Pt ═ 197,4Ir ═ 198

Os ═ 199Hg ═ 200

Au ═ 197?

Bi ═ 210?

Ti ═ 204Pb ═ 207

Zb ═ 94Mo ═ 96Rh ═ 104,4Ru ═ 104,4Pd ═ 106,6Ag ═ 108Cd ═ 112Ur ═ 116Sn ═ 118Sb ═ 122Te ═ 128?J ═ 127

Cs ═ 133Ba ═ 137

V ═ 51Cr ═ 52

Mn ═ 55Fe ═ 56

Ni ═ Co ═ 59Cu ═ 63,4Zn ═ 65,2

? ═ 68? ═ 70

As ═ 75Se ═ 79,4Br ═ 80

Rb ═ 85,4Sr ═ 87,6

Ce ═ 92La ═ 94Di ═ 95Th ═ 118?

B ═ 11C ═ 12N ═ 14O ═ 16F ═ 19

Na ═ 23

CC3/4


3


iv Many scientists did not agree with the way Mendeleev organised the elements in his periodic table.

Explain how Mendeleev’s early ideas were later supported by evidence.

(2)


3 The lithium atom can be represented with numbers next to its chemical symbol as in Figure 3.

Figure 3

a Complete Figure 4 below to show the structure of the lithium atom.

Atomic number

Mass number

Number of:

protons neutrons electrons

3

Figure 4

(3)

b Carbon is another element in the periodic table.

The atomic number of carbon is 6.

The mass number of carbon is 12.

Draw a labelled diagram below to show the number and position of the sub-atomic particles in the carbon atom.

(4)

Li73

CC3/4


4


c Atom A has a mass number of 239 and an atomic number of 93.

Atom B has a mass number of 239 and an atomic number of 94.

The letters are not the chemical symbols of the elements.

i State one way in which these atoms are the same in terms of particles.

(1)

ii Explain why atom A and atom B are different elements.

(1)


4 Figure 5 shows an outline of the modern periodic table.

The letters represent the positions of different elements in the table.

The letters are not the chemical symbols of the elements.

Figure 5

a i Predict the electronic configuration of element E.

Tick one box.

A 2.8.2

B 2.7.2

C 2.8.6

D 2.9.2

(1)

E

Q

G

J

CC3/4


5


ii Predict the electronic configuration of element Q.

Tick one box.

A 2.8.1

B 1.8

C 2.7

D 2.8

(1)

iii Predict the electronic configuration of element G.

Tick one box.

A 2.8.2

B 1.8.2

C 2.8.3

D 2.8.6

(1)

b Explain why E is classed as a metal and J is classed as a non-metal, in terms of their positions on the periodic table.

__________________________________________________________________________________

__________________________________________________________________________________

(2)

c Explain why you would expect element J to be unreactive.

__________________________________________________________________________________

(2)


CC3/4


6


5 Figure 6 shows the periodic table as devised by Mendeleev in 1869 (also shown in question 2).

Figure 6

Compare and contrast Mendeleev’s periodic table with the modern periodic table.

Use the information in Figure 6 and your own scientific knowledge to answer the question.

(6)


TOTAL FOR PAPER = 35 MARKS

H ═ 1

Li ═ 7

Be ═ 9,4

Si ═ 28P ═ 31S ═ 32

Cl ═ 35,5K ═ 39

Ca ═ 40? ═ 45

?Er ═ 56?Yt ═ 60?In ═ 75,6

Al ═ 27,4Mg ═ 24

Ti ═ 50 Zr ═ 90 ? ═ 180Ta ═ 182W ═ 186Pt ═ 197,4Ir ═ 198

Os ═ 199Hg ═ 200

Au ═ 197?

Bi ═ 210?

Ti ═ 204Pb ═ 207

Zb ═ 94Mo ═ 96Rh ═ 104,4Ru ═ 104,4Pd ═ 106,6Ag ═ 108Cd ═ 112Ur ═ 116Sn ═ 118Sb ═ 122Te ═ 128?J ═ 127

Cs ═ 133Ba ═ 137

V ═ 51Cr ═ 52

Mn ═ 55Fe ═ 56

Ni ═ Co ═ 59Cu ═ 63,4Zn ═ 65,2

? ═ 68? ═ 70

As ═ 75Se ═ 79,4Br ═ 80

Rb ═ 85,4Sr ═ 87,6

Ce ═ 92La ═ 94Di ═ 95Th ═ 118?

B ═ 11C ═ 12N ═ 14O ═ 16F ═ 19

Na ═ 23

CC3/4 End of Unit Test

Documents

Transcript of CC3/4 End of Unit Test