Formulae on Periodic Classification Of Elements


Elements in the same period show trends in atomic radius, ionization energy, electron affinity, and electro negativity. Moving left to right across a period, atomic radius usually decreases. This occurs because each successive element has an added proton and electron which causes the electron to be drawn closer to the nucleus.

A group or family is a vertical column in the periodic table.

The total number of electron shells an atom has determines the period to which it belongs. Each shell is divided into different subshells, which as atomic number increases are filled in roughly this order.

More Formulae are available as a part of the SMART Subscription

Preparation Tip for You!
Read the Tips? Now why don't you try solving a few questions in the Practice Lounge

Practice Questions Now

Sign Up to see Formulae for Periodic Classification Of Elements