Which subatomic particle plays the greatest part in determining the properties of and element?

There are three subatomic particle that are present in an atom. These are electrons, protons, and neutrons. Among these three, I believe the subatomic particle that plays the greatest part in determining the properties of and element would be the electron. It is what determines how the element would react in different conditions.

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.