1.1 Introduction of solid

1.1 Introduction

Solid is one of the three main states of matter, along with liquid and gas. Matter is the "stuff" of the universe, the atoms, molecules and ions that make up all physical substances. In a solid, these particles are packed closely together and are not free to move about within the substance.

              Solid :-  The matter which possess rigidity  and hence possesses a definite shape and volume ,are called Solid.