Yes, every particle with mass, including individual atoms and subatomic particles, generates its own gravitational force. The strength of the gravitational force depends on the mass of the object.
The gravitational force experienced by an object near the surface of the Earth is commonly denoted by 'g' and is approximately 9.8 meters per second squared (m/s²). However, this value represents the acceleration due to gravity caused by the cumulative effect of the entire mass of the Earth.
If we consider the gravitational force of a single proton, it is an extremely tiny force. The mass of a proton is approximately 1.67 x 10^(-27) kilograms, which is exceptionally small compared to the mass of the Earth. Consequently, the gravitational force exerted by a single proton is negligibly small and is typically not considered significant in everyday contexts.
It's worth noting that the gravitational force between two particles becomes noticeable when they have a substantial amount of mass or when they are extremely close together, as is the case in celestial objects like planets or stars. However, for individual particles like protons, their gravitational force is typically negligible compared to other fundamental forces such as electromagnetism or the strong and weak nuclear forces.