Group 0: the noble gases

This question is about gases.

The box gives the names of some gases.

Choose gases from the box to answer questions (i) to (iv).

You may use each gas once, more than once or not at all.

Identify two gases in Group 0 of the Periodic Table.

Identify the gas that makes up about 21% of the atmosphere.

Identify a greenhouse gas.

Identify the toxic gas formed by incomplete combustion of a hydrocarbon.

Describe a test to show that a gas is carbon dioxide.

This question is about gases.

The table gives information about five gases.

Use information from the table to answer these questions. Each gas may be used once, more than once or not at all.

Give the name of the gas that is about 79 % of the atmosphere by volume.

Give the name of the gas that is a compound.

Give the name of the least reactive gas.

Give the name of the gas that is not normally found in the atmosphere.

Give the name of the gas that affects global warming.

Calculate the M_r for carbon dioxide.

Give a reason why it is not possible to give information for air in the table.

When copper(II) carbonate is heated, the products are copper(II) oxide and carbon dioxide.

Give the name for this type of reaction.

Give the colour change that occurs during this reaction.

Give a chemical equation for this reaction.

Use the Periodic Table to help you answer this question.

Name the element with atomic number 14.

Name the element in Group 2 and Period 3.

Name an element that is a liquid at room temperature.

Give the electronic configuration of an atom of phosphorus.

Give the formula of sodium sulfide.

Explain, in terms of electron configuration, why neon is unreactive.

The table lists three subatomic particles.

Complete the table by giving the missing information.

How are elements arranged in the Periodic Table?

Which statement is correct about the position of phosphorus, P, in the Periodic Table?

Explain which of the four elements in the diagram is least reactive.

This question is about gases.

Name the gas that is about 1% of dry air by volume.

Which is the most abundant gas in dry air by volume?

A student uses this apparatus to find the percentage by volume of oxygen in a mixture of oxygen and neon.

This is the student's method.

• measure the initial length of the column of gas in the inverted test tube

• leave the test tube in the beaker for a week

• measure the final length of the column of gas in the test tube

Some of the iron wool rusts.

Give the chemical name for rust.

Give a reason why neon does not react with the iron wool.

The table shows the student’s results.

Use the results to calculate the percentage of oxygen in the mixture of oxygen and neon.

In this question the answer to each part is a number.

Give the pH value of a neutral solution.

Give a pH value of a weakly acidic solution.

Give the number of the Group in the Periodic Table that contains the elements that do not readily react.

Give the number of different elements present in glucose, C₆H₁₂O₆

The diagram shows the positions of some elements in part of the Periodic Table.

Na A l S C l

K Xe

Give the symbol of a metal from the diagram.

Give the symbol of an element from the diagram that forms an acidic oxide.

Give a similarity in the electron configurations of A l and I n.

Explain which element in the diagram is unreactive.

A teacher adds a small piece of sodium to a glass trough containing water and universal indicator.

The universal indicator changes colour.

The equation for the reaction is

Explain the final colour of the universal indicator.

The teacher repeats the experiment with potassium instead of sodium.

Give one similarity and one difference observed with potassium.

similarity

difference

The reaction with sodium produces 0.036 g of hydrogen gas.

One mole of hydrogen gas contains 6.010²³ molecules.

Calculate the number of molecules of hydrogen gas produced in the reaction with sodium.

Give your answer to two significant figures.

This question is about gases in the atmosphere.

The box gives the names of some gases.

Choose gases from the box to answer these questions.

Identify the least reactive gas in the atmosphere.

Identify the most abundant gas in the atmosphere.

Identify the gas that is not normally found in the atmosphere.

State an environmental problem caused by increasing amounts of carbon dioxide in the atmosphere.

Describe a test for carbon dioxide.

Titanium is an important metal in industry.

Titanium dioxide (TiO₂) can be converted into titanium metal in two stages.

Stage 1 titanium dioxide is converted into titanium(IV) chloride (TiCl₄)

Stage 2 titanium(IV) chloride is converted into titanium

This is the equation for the reaction in stage 1.

Calculate the volume, in dm³, of chlorine gas at rtp needed to react completely with 20 tonnes of titanium dioxide.

Give your answer in standard form.

[1 tonne = 10⁶g M_r of TiO₂ = 80]

[molar volume of chlorine gas at rtp = 24 dm³]

In stage 2, titanium(IV) chloride vapour is passed through molten magnesium in a container filled with argon.

This is the equation for the reaction in stage 2.

Explain why the container is filled with argon rather than air.

Aeroplanes are made of an alloy containing aluminium and titanium.

Explain why the alloy is stronger than pure titanium metal.

You may include diagrams in your answer.

A teacher uses this apparatus to find the percentage of oxygen in a gaseous mixture of oxygen and argon.

This is the teacher’s method. Step 1 heat the copper powder Step 2 push the plunger on syringe A to pass the mixture of oxygen and argon over the hot copper so that the mixture moves into syringe B Step 3 push the plunger on syringe B to pass the mixture of oxygen and argon over the hot copper so that the mixture moves into syringe A Step 4 record the reading on syringe A Step 5 repeat Steps 2, 3 and 4 a number of times

The volume of gas decreases as the oxygen reacts with the copper.

Argon is unreactive so does not react with the copper.

The copper powder turns black.

Give a reason why the copper powder is heated.

State why argon is unreactive.

Give the name of the black powder that forms when the oxygen reacts with the copper.

The table shows the teacher’s results.

State how the results show that all the oxygen has reacted.

The volume of gas in the glass tube and connecting tubes is 175 cm³.

Use this value and the results table to calculate the percentage of oxygen in the mixture of oxygen and argon.

Suggest one reason why the calculated percentage of oxygen in the mixture may not be accurate.

This question is about gases.

The box gives the names of some gases.

Use gases from the box to answer these questions.

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

Name the most abundant gas in the Earth’s atmosphere.

Name the gas that is a compound.

Name the least reactive of the gases.

Name the gas formed by the complete combustion of hydrocarbons.

Describe the test for hydrogen gas.

This question is about chemical elements.

Use the Periodic Table to help you answer this question.

Identify the element with atomic number 5

Give the symbol of a metallic element in Period 3

Identify the element whose atoms contain 14 protons.

Identify the element whose atoms have the electronic configuration 2.5

Give the name of the compound formed between oxygen and the element with atomic number 13

The position of an element in the Periodic Table can be used to predict its properties.

Which group contains elements that are all unreactive?

Which of these is the least reactive element in Group 1?

This question is about gases in the atmosphere.

The box gives the names of some gases in the atmosphere.

Choose gases from the box to answer these questions.

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

Identify a noble gas.

Identify a gas that makes up about 78% of the atmosphere.

Identify a greenhouse gas.

Identify a gas produced by the thermal decomposition of calcium carbonate.

Sulfur reacts with oxygen to produce sulfur dioxide gas.

Write a chemical equation for this reaction.

State an environmental problem caused when sulfur dioxide gas dissolves in water in the atmosphere.

This question is about gases in the atmosphere.

The box gives the names of some gases in the atmosphere.

Use gases from the box to answer the questions.

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

Identify the two noble gases.

Identify the gas that is a compound.

Identify the most abundant gas in the atmosphere.

Identify the greenhouse gas.

Describe the test for oxygen.