KS3 QCA Unit 9EF

Which non-metal element conducts electricity in one particular form?

[Level 3]

Graphite/carbon

[Level 3]

Name three elements that are gases.

[Level 3]

Any three from:
hydrogen, oxygen, nitrogen, chlorine, helium, argon, neon, xenon, krypton, radon

[Level 3]

What element is given off when metals react with acids?

[Level 4]

Hydrogen.

[Level 4]

How can you test for hydrogen gas?

[Level 4]

Put a lighted splint into a test tube full of the gas and it burns with a squeaky ‘pop’.

[Level 4]

What is a chemical base?

[Level 5]

A sunstance that neutralises an acid to prodce water.

[Level 5]

If copper oxide (black powder) was mixed with warm sulphuric acid (colourless solution) and stirred. What two things could you expect to see happen?

[Level 5]

The copper oxide would dissolve; the solution would turn blue.

[Level 5]

What salt is made when calcium reacts with hydrochloric acid?

[Level 3]

Calcium chloride

[Level 3]

Explain why very few metal elements are found as unreacted metal in the Earth’s crust.

[Level 6]

They have reacted with other elements to form compounds.

[Level 6]

What two things would you see happen when sodium is put into cold water?

[Level 7]

Sodium melts and rushes round the surface, a gas is given off.

[Level 7]

Write a word equation for the reaction between lithium and water.

[Level 7]

Lithium + water ->
lithium hydroxide + hydrogen

[Level 7]

x

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