1.All matter is made up of atoms or molecules of
independent existence.
2. These constituent particles of each substance are distinct
and have certain properties which are different
from those of atoms or molecules of all other substances.
3. Molecules of the same substance are identical in all
respects.
4. There are empty spaces between molecules, which
increase as in the following order:
solid < liquid < gas
5. Forces of attraction being exerted between molecules
are in the following decreasing order :
solid > liquid > gas
6. Molecules possess kinetic energy to move freely
through the bulk or volume of liquid or gas. Increasing
order of kinetic energy is as below:
solid < liquid < gas
7. The molecules of a gas are in continuous random motion
and exert pressure on the walls of the container.
8. The kinetic energy increases on increasing the temperature.
