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Chemistry

Differentiate between the terms elements, compounds & mixtures with suitable examples.

Elements, Compounds & Mixtures

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Answer

Elements, compounds and mixtures can be differentiated as below:

ElementsCompoundsMixtures
Pure substance made up of one kind of atoms only.

E.g., Iron [Fe], Sulphur [S]		Pure substance made up of two or more elements.

E.g., Iron Sulphide [FeS]		Impure substance made up of two or more elements or compounds.

E.g., Iron Sulphur mixture
Elements i.e., atoms of one kind are present on their own.

E.g., Iron & sulphur exist on their own as elements – iron & sulphur		Components in a compound are present in a definite proportion.

E.g., Iron and Sulphur are chemically combined in a fixed ratio in iron sulphide		Components in a mixture present in any proportion.

E.g., Iron and sulphur are mixed in any ratio in the mixture of iron and sulphur.
Elements have a definite set of properties.

Elements are classified into metals & non-metals each with its own properties		Compounds have a definite set of properties.

Elements of a compound do not retain their original properties.		Mixtures do not have a definite set of properties.

Components of a mixture do retain their original properties.
Elements occur on their own or as compounds & can be separated by -chemical & physical methods.Elements in a compound are chemically combined and can be separated by chemical methods only.Components in a mixture can be separated by physical methods only.
Example:
Metal : Iron, copper, silver, gold
Non-metal: sulphur, chlorine		Example:
Iron sulphide, copper oxide		Example:
Iron + sulphur, Sodium chloride + water

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