How is matter classified, Give example for each?
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Matter can be classified into 2 groups, Pure substance and Mixture.

Pure substance is a type of matter with "the same physical and chemical properties throughout the sample". Examples include tin, copper, oxygen, chlorine.

Mixtures on the other hand, are two or more combined substances that can be seperated. Some examples include smog, mud, sea water and air.

1.solid

2.carbon dioxide

3.helium

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