Atoms can be divided more so thats not true. atoms from the same element arent all nesacarly identical because of isotopes
An atom is made up of electron, proton and neutron
In case of neutral atom there must be the same number of electron and proton as the neutral atom don't carry any charge.
In an atom, Proton bears positive charge while electron bears negative charge and the neutron don't have any cahrge on it.
It shows that there must be equal number of proton and electron to make an atom, otherwise it will show some charge.
We need to know the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure.
The relationship is: As air pressure in an area increases, the density of the gas particles in that area increases.
For any gaseous substance, density of gas is directly proportional to pressure of gas.
This can be explained from idial gas edquation:
PV=nRT
PV=RT [where, w= mass of substance, M=molar mass of substance]
PM=RT
PM=dRT [where, d=density of thesubstance]
So, for a particular gaseous substance (whose molar mass is known), at particular temperature, pressure is directly related to density of gaseous substance.
Therefore, as air pressure in an area increases, the density of the gas particles in that area increases.