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Give the range of pH for acids and bases.

Acids: 0-7.


Bases : 8- 14.

How can hydrogen be produced from water?

Electrolysis.

Why is the exhaust emission from a car environmentally safe?

No CO2 produced.

Name a metal that can be cut with a knife.

Lithium.

What happens if a piece of this metal is dropped into water?

Fizzes on surface of water giving off hydrogen gas.

Give two properties of the atomic nucleus

1. Very small


2. Contains protons and neutrons.