Is Matter Around Us Pure?

Pure Substance

If a substance is made up of only one type of
constituent particles (fixed composition of constituents).

Element

It is basic form of matter which cannot be broken down into simpler substances by chemical reactions.

Compound

A substance made of elements chemically combined with one another in a fixed proportion.

Mixtures

When more than one kind of pure substances are mixed together to form a substance it is called ________.

Homogeneous

It's a mixture in which the constituents are uniformly distributed throughout without any clear boundary of separation between them.

Heterogeneous

It's a mixture that does not have uniform composition, i.e. it has visible boundaries of separation.

Solution

It's a homogeneous mixture of two or more
substances.

Solvent

The component of solution that dissolves the other
component (present in large amount).

Solute

The component of the solution that is dissolved in the solvent (present is lesser quantity).

Alloys

Mixture of 2 or more metals or a metal and a nonmetal, they can't be separated by simple physical means.

Suspensions

Its a heterogeneous mixture in which the solute
particles do not dissolve, but remain suspended in the medium.

Colloidal solution

Its a mixture which is actually heterogeneous but looks like homogeneous as particles are uniformly spread throughout the solution.

Tyndall Effect

The scattering of light by colloidal particles.