What do the 3 parts of the atom determines?

Answer 1

The Proton (+) determines what kind of element the atom is.

The Neutron (=) determines radioactivity.

The Electron (-) determines the reactivity of the atom, and controls reactions.

Answer 2

The three subatomic particles are protons (very massive, positively charged), neutrons (very massive, uncharged), and electrons (very little mass, negatively charged). Protons and neutrons have very nearly the same mass, although neutrons are slightly heavier. Electrons and protons have charges of equal magnitude, even though they are of opposite sign.

The number of protons indirectly determines many properties of an atom. In neutral atoms, the number of protons will equal the number of electrons, so the number of protons will determine the number of valence shell electrons, as well as the charge on the atom when it is ionized by addition of electrons to make a full valence shell, or by removal of electrons to empty a valence shell. The number of valence shell electrons directly determines most of the chemical and physical properties of an elemental substance.

Neutrons don't significantly influence chemistry, except in very light elements, where they have a large influence on the mass of the atoms. Neutrons are more important on a sub-atomic scale. Inside the nucleus of an atom, the strong nuclear force pulls neutrons and protons together, keeping the nucleus intact against the electromagnetic repulsion of the protons.

Answer 3

The nucleus. The number of protons, according to the Periodic Law, determines the identity of the atom and the properties of the element.

Answer 4

1. Protons determine the element of an atom.
2. Neutrons provide stability to the atom.
3. Electrons determine the atom's chemical properties and reactivity.