Elements, Compounds and Mixtures

 

 

Elements, Compounds and Mixtures
Elements, Compounds and Mixtures

Elements

An element is a substance which can neither be broken nor built from two or more simple substances by any physical or chemical method. Or in the other words an element is  a pure substance which contains only one kinds of atom, e.g., Fe (Iron) , Na (sodium) ect.

Types of Elements

(a) Metals 
(b) Non Metals 
(c) Metalloids 

Compounds

A compound is a pure substance which contains more than one kind of element or atom in fixed  proportion by weight e.g., NaCl (Sodium chloride), SO2 (Sulphur dioxide), etc.

Types of Compounds

(a) Organic Compounds 

(b) Inorganic Compounds

The properties of a compound are completely different from those of its constituents.

Mixtures

A material containing two or more elements or compounds in any propertion is a mixture. It can be separated into its constituents . e.g., air , milk , paints , cements etc.

Types of mixtures

(a) Homogeneous Mixture

A mixture is said to be homogeneous if its composition is uniform throughout.

(b) Heterogeneous Mixture

A mixture is said to be homogeneous if its composition is not uniform. 

The properties of a mixture are the properties of its constituents . 

A mixture with definite boiling point is known as azeotropic mixture.

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