Why Atomic Radius is less for the element having more particles.

Hi guys we know that Atomic Radius is the distance between the center of the nucleus and the outer orbit of an element. Atomic Radius is less for the element those have more particles(Neutron, Proton, Electron), but why? Let’s know the reason.

It’s an Periodic Properties of an element. It decreases from left to right in the period and increase from up to down in a group . And if we look at the periodic table we can see that element of left side have less particles(Neutron, Proton, Electron), then the element of right side. If we thought generally, we can say that the element having more particles(Neutron, Proton, Electron) should have more Atomic Radius. But really it’s opposite to our thought. Element having more particles(Neutron, Proton, Electron) have less Atomic Radius instead of having more. The reason is gravitational force between the nucleus and electrons.|

All we know all the bodies of the universe attrac each other to itself. This cause a displacement to the lighter body. For the same reason the Atomic Radius of element having more particles(Neutron, Proton, Electron) is less than the Atomic Radius of the element having less particles(Neutron, Proton, Electron). When an atom have more Neutron, Proton and Electron then the mass of the nucleus is more. So it can attrack the electron with more force and that cause a displacement of the electron. For this the electron of outer orbit comes closer to the nucleus, so the outer orbit also comes closer the nucleus, and decrease the Atomic Radius.

The another things is Atomic Radius increase feom up to down in the periodic table. The Reason is that every times there added a new orbit from up to down. That cause more distance from the nucleus to the outer orbit.

That’s why Atomic Radius is less for the element having more particles.

Why Atomic Radius is less for the element having more particles.