But i was trying to determine how density or other properties of matter would affect gravity effect. I know it doesn't, but why not?
What properties does matter have? Mass, velocity, spin (which I am assuming/suggesting "causes" charge).
Have you ever wondered why it is that G is such a small number?
Density does affect the gravitational effect: If Earth were twice as dense, but with the same mass, it would have a radius of 5057km and g at the surface would be 15.6 ms-2. If Earth were twice as dense, but the same volume, then g at the surface would be 19.6 ms-2.
Gravity acts on mass, so density affects the gravitational effect - this profoundly obvious fact seems to have been overlooked at the sub-atomic level, where G is still used with the same value as at the level of atomic structures.
The Earth has a mass of 5.97x1024 kg and a volume of 1.09x1021 m3, but of that volume, 99.999999999982% is empty space, gravity acts on only the other 0.000000000018%, because that is the proportion of volume occupied by the mass. An interesting comparison G= 0.0000000000667 - Have you ever wondered why it is that G is such a small number?
Gravity acts on mass, gravity can ONLY act on mass.
Objects with mass are affected by force. Objects with mass can ONLY be affected by force.