properties of matter

The branch of science, which deals with the study of matter, its composition, its properties and the changes that it undergoes in composition as well as in energy during various processes, is defined as chemistry. It has been further divided into different branches depending upo..

Today the fact that all matter is made up of atoms is universally accepted. Realisation of the atomic constituents of matter began in 1828 when Scottish botanist Robert Brown observed a random ceaseless motion of pollen grains suspended in a liquid. Many macroscopic propert..

Chemical reactions are the processes in which new substances with new properties are formed. A chemical reaction should satisfy the following conditions: There must not be either a gain or loss of matter. There must be either an evolution or an absorption of heat i.e. an energy chang..

Early Greek Idea Empedocles (500 - 430 B.C) and Aristotle (384 - 322 B.C) suggested that all matter was made up of four primary elements fire, water, air and earth. Further, the properties of any particular substance were believed to be due to the composition ratio of these fo..

Introduction - We heat raw food to soften it. We freeze water into ice by cooling it in refrigerator. When we boil water in a kettle we observe the steam oozing from the mouth of the kettle. When the cork is difficult to remove, we slightly heat the mouth of the bottle, so that the cork comes out e..

Introduction - It is a matter of common experience that the objects inside a dark room, which are invisible, become visible when the room is illuminated by a source of light. Thus light can be defined as the external cause responsible for the sensation of vision. The branch of Physics dea..

A change in which the composition of a substance is altered is called as chemical change of matter. As a result, the original properties get changed and one or more new substances are formed. Iron is greyish white metal and conducts electricity. It is attracted by a magnet, and ..

Around (600 - 500 B.C) the 'Samkhya' philosophy was popular. It asserted that matter was made up of five 'bhutas' or elements consisting of akasa (sky or space), vayu (air), tejas (fire), ap (water) and kshiti (the Earth). These bhutas, besides sharing common properties like co..

When the shape, size, appearance or state, of a substance is altered, but its chemical composition remains same a physical change of matter takes place. No new substance is formed. It is usually a change, which is reversible, that is, by reversing the process, the original substance can b..

Introduction - The branch of physics which deals with magnetism due to the electric current is called electromagnetism. For a long time it was hard to believe if there existed a relation between electricity and magnetism. Hans Christian Oersted observation made a discovery demonstrating a close rel..