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Answer 1

1. a mixture is a material made up of two or more different substances which are not chemically combined. A 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.

3. They are pure substances which have only one kind of atom, like Na, H, O, Cl They are pure substances that may or may not have one kind of atom. Example - H2O They are impure substances made up of two or more elements or compounds. Example - Iron & Sulphur mixture.

Answer 2

Answer:

1. chemistry, a mixture is a material made up of two or more different substances which are not chemically combined. A 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.

2. Mixtures are physical combinations of two or more elements and/or compounds. Mixtures can be classified as homogeneous or heterogeneous. Elements and compounds are both examples of pure substances. Compounds are substances that are made up of more than one type of atom.

3. compound is the substances that are formed by combining two are more chemical elements. A mixture is a substance created from two or more matter that can be separate with the help of physical methods. Compound substances are always homogeneous in nature.

4. We need to separate different components of a mixture to separate the useful components from the non-useful or some harmful components.

5. First five elements in the Modern Periodic Table are : Hydrogen, Helium, Lithium, Beryllium and Boron.