MATTER

Monoatomic molecule-1 atom. Example-Neon, Argon.

Maharishi kanada considered matter to be made tiny particles called anu.

Molecule can exist free in nature and has all the properties of that substance.

Matter is anything that has mass, occupies space and can be perceived by our senses.

Diatomic molecules- 2 atoms. Example-hydrogen, Oxygen

Polyatomic molecule- More than 2 atoms. Example- Water, CO2

Molecules are very small in size

They have spaces between them

They are in random motion

They attract each other

Size of molecules is 10-10 m.

when molecules of water colide with molecules of any othe substance they are in a zig zag path.

Inter molecular force of attraction is a strong attractive force.

10-9 m

force of attraction between same substance-cohesion force

force of attraction between different substances-force of adhesion.

as liquids and gases have weak molecular force of attraction they can flow.

Adhesives have strong intermolecular force of attraction

The process in which one state of matter changes to another state of matter either by absorption or rejection of heat is known as change of state of matter.

Sublimation-camphor, Iodine

The heat that does not change the temperature during change of state of matter is called the latent heat or hidden heat.

m point of ice decreases with increase of pressure

All liquids expand on heating

bp of l increases with increase in pressure this is why hard cook vegies on mounts as low pressure but easy in pressure cookers as pressure high by keeping wp inside it.

bp of liquid increases impurities added