Question

Write scientific reason : Atomic radius goes on decreasing while going from left to right in a period

Answer 1

As we move from left to right in a period, the no of electrons in the outer shell of the atom increase,which results in increase in nuclear charge of the nucleus ,as the same no of protons are added to nucleas. This increases the force of attraction between nucleus and electrons in outer shell.

Due to this increased force ,the size of the atom shrinks towards the nucleus, and hence the size decreases, atomic radius decreases.