Question

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Answer 1

1.Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure.

2.mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

4.A homogeneous mixture is a solid, liquid or gaseous mixture that has the same proportions of its components throughout any given sample.

5.A heterogeneous mixture has components in which proportions vary throughout the sample.

2.

Classification of the given substances in elements compounds and mixtures

Elements: Sodium, Silver, Tin and Silicon.

Compounds: Calcium carbonate, Methane and carbon dioxide.

Mixtures: Soil, Sugar, Coal, Air, Soap and Blood.

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Answer 2

Answer:

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