Term
Which non-metal element conducts electricity in one particular form?
[Level 3] |
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Definition
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Term
Name three elements that are gases.
[Level 3] |
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Definition
Any three from:
hydrogen, oxygen, nitrogen, chlorine, helium, argon, neon, xenon, krypton, radon
[Level 3] |
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Term
What element is given off when metals react with acids?
[Level 4] |
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Definition
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Term
How can you test for hydrogen gas?
[Level 4] |
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Definition
Put a lighted splint into a test tube full of the gas and it burns with a squeaky 'pop'.
[Level 4] |
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Term
What is a chemical base?
[Level 5] |
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Definition
A sunstance that neutralises an acid to prodce water.
[Level 5] |
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Term
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] |
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Definition
The copper oxide would dissolve; the solution would turn blue.
[Level 5] |
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Term
What salt is made when calcium reacts with hydrochloric acid?
[Level 3] |
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Definition
Calcium chloride
[Level 3] |
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Term
Explain why very few metal elements are found as unreacted metal in the Earth's crust.
[Level 6] |
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Definition
They have reacted with other elements to form compounds.
[Level 6] |
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Term
What two things would you see happen when sodium is put into cold water?
[Level 7] |
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Definition
Sodium melts and rushes round the surface, a gas is given off.
[Level 7] |
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Term
Write a word equation for the reaction between lithium and water.
[Level 7] |
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Definition
Lithium + water ->
lithium hydroxide + hydrogen
[Level 7] |
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