Scientists improved Mendeleev’s early periodic table by . using numbers of neutrons and protons to organize the elements by their properties

using atomic number instead of atomic mass to organize the elements

including physical properties of elements such as melting point and density

including chemical properties of elements such as the ability to burn or to tarnish

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

+15-35=-20

going in opposite directions