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Compounds formed from metals and non-metals consist of ions

What is an ion?

What is the law of conservation of mass?

What is meant by thermal decomposition?

Explain the limestone cycle

Carbon dioxide turns limewater cloudy

Limestone is damaged by acid rain which reacts with it

Cement is mixed with sand to make mortar.

Ores contain enough metal to make it economical to extract

Metals apart from unreactive ones, are found as compounds that require chemical reactions to extract the metal