11 mark
The diagram shows part of the structures of five substances, A, B, C, D and E.
Which one of these structures, A, B, C, D or E, is monatomic?
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Noble Gases (Cambridge O Level Chemistry)
Exam Questions
22 mins5 questions1a1 mark
For each of the following select an element from Period 4, potassium to krypton, that matches the description.
It is a brown liquid at room temperature.
1b1 mark
It forms a compound with hydrogen having the formula XH4.
1c1 mark
A metal that reacts violently with cold water.
1d1 mark
It has a complete outer energy level.
1e1 mark
It has oxidation states of 2 and 3 only.
1f1 mark
It can form an ion of the type X-.
1g1 mark
Separate: Chemistry and Extended Only
One of its oxides is the catalyst in the Contact Process.
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2a1 mark
Helium, neon, argon, krypton, xenon and radon are noble gases in Group VIII.
Name the noble gas which has the greatest volume composition in air.
2b1 mark
State one use for helium.
2c1 mark
Radon is very unreactive.
Use the electronic structure of radon to explain why.
2d2 marks
Two isotopes of radon are shown.
(i)
Give one similarity in the atomic structure of these two isotopes.
[1]
(ii)
Give one difference in the atomic structure of these two isotopes.
[1]
2e3 marks
Xenon forms a compound that contains only xenon, oxygen and fluorine.
The compound contains 22.1% oxygen by mass and 17.5% fluorine by mass.
Calculate the empirical formula of this compound.
2f4 marks
A sample of neon has a volume of 21 dm3 at room temperature and pressure.
(i)
The temperature of the sample is increased.
The pressure remains constant.
Describe and explain, using kinetic particle theory, what happens to the volume of the sample.
[1]
(ii)
The pressure of the sample is increased.
The temperature remains constant.
Describe and explain, using kinetic particle theory, what happens to the volume of the Sample.
[1]
(iii)
Calculate the mass of neon in the 21 dm3 sample.
Give your answer to two significant figures.
[2]
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