#### SI units and dimension measurement

In physical chemistry, we commonly deal with scaler and vector quantities such as pressure, volume, mass, temperature, current, etc with its CGS and SI units and dimension.

The quantity which has a magnitude but not a definite direction known as a scalar quantity.

The quantity which has both magnitudes and a definite direction known as a vector quantity.

The physical quantity has two components, namely, numerical value and its unit.

The quantity 5 newton means the unit is newton and the numerical value 5.

In this web page, we study some basic and commonly used scaler and vector quantity with its unit and dimension.