There is both gravity and repulsion between molecules, and these two forces always cancel each other

You mean the microstructure, in the microstructure, there is a certain spacing between molecules, and the size of this spacing is determined according to the gravitational repulsion between the molecules, and the two molecules can be seen as having a spring, which will bounce off when they get close, and will be pulled in because of the gravitational force when they leave, so that a fixed spacing is determined, and the gravitational force and the repulsion force cancel each other out.

However, when two molecules are affected by external forces, they sometimes separate, so that when they are separated to a certain distance, the gravitational force and the repulsive force become extremely small, and they cannot return to the original spacing state, so that in the macroscopic state, a chemical reaction occurs.

There is also a situation where when two molecules are close together under the action of an external force, and finally overlap together to become one molecule, so that the gravitational force is very strong and can no longer be separated, and it is a nuclear reaction on the macroscopic level.

There is both gravitational and repulsive force between molecules, and when the distance between molecules is equal to r0, the gravitational force is equal to the repulsive force, that is, they cancel each other; When the distance between molecules is greater than r0, the gravitational force between molecules is greater than the repulsive force, which is manifested as gravitational force. When the distance between the molecules is less than r0, the gravitational force between the molecules is less than the repulsive force, which is manifested as the repulsive force.

Because there is an equilibrium point in the potential energy of molecules, there is both gravitational and repulsive force between molecules. They all decrease as the distance increases. However, at a certain distance d, when the value of d is less than the equilibrium point, the repulsion force increases faster than the gravitational force, which is manifested as the repulsion between molecules.

The greater change in the repulsive force between molecules than the gravitational force means that with the change of the molecular spacing, the change in the repulsion force is greater.

Intermolecular repulsion and gravitational force exist at the same time, and the effective effect of gravity is about a few molecules in size, and the gravitational force is negligible beyond this range. The effective distance of the repulsion force is smaller, and the repulsive force increases dramatically as the molecule approaches the effective distance of the repulsion force (the gravitational force also increases, but the repulsion force increases much faster than the gravitational force), and the intermolecular force appears as a net repulsive force.

You mean the microstructure, in the microstructure, there is a certain spacing between molecules, and the size of this spacing is determined according to the gravitational repulsion between molecules, and the two molecules can be seen as having a spring, which will bounce away when they get close, and will be pulled in because of gravity when they leave, so that a fixed spacing is determined, and the gravitational force and the repulsion force cancel each other out.

However, when two molecules are affected by external forces, sometimes the hands will be separated, so that when separated to a certain distance, the gravitational force and the repulsion force become extremely small, and it cannot be restored to the original spacing state, so that in the macroscopic state, a chemical reaction occurs.

There is also a situation where two molecules are close together under the action of external force, and finally the heavy friend beams are stacked together to become one molecule, so that the gravitational force is very strong and can no longer be separated, and macroscopically it is a nuclear reaction.

Molecules are made up of atoms, and atoms are made up of nuclei, electrons. Same-sex repulsion between charge-free slag and opposite-sex attraction.

The intermolecular force is also called van der Waals force, and there are three types of force.

Dispersion force: This is due to the instantaneous non-coincidence of the positive and negative charge centers in the Gaotong molecule, which causes the molecule to produce a dipole, which is called an instantaneous dipole, resulting in a force. In non-polar anons there are only dispersion forces, such as between oxygen molecules.

Inductive force: This is due to the fact that polar molecules have a permanent dipole, which will have an impact on non-polar molecules, and the induction produces a dipole and thus produces an acting force. For example, when a water molecule (polar molecule) is close to an oxygen molecule (a non-polar molecule), the oxygen molecule will produce an occasional grinding pole.

Orientation force: Dipole interaction between polar molecules. For example, there is an orientation force between water molecules.