Question

If two atoms have the same outermost then the atom having larger number of electrons in the outermost is smaller than the one having fewer electrons in the same outermost orbit. Why??​

Answer 1

Answer:

Explanation:

THAT IS BECAUSE OF THE INCREASING NUCLEAR FORCE BETWEEN THE ELECTRONS AND THE NUCLEUS. MORE THE NO. OF ELECTRONS IN OUTERMOST ORBIT OF AN ATOM MORE WILL BE THE NUCLEAR FORCE OF ATTRACTION BETWEEN THE NUCLEUS AND THE ELECTRONS AND CORRESPONDING TO THAT THE ATOMIC RADIUS WILL ALSO BE SMALL IN THOSE ATOMS.

TAKE EG. OF SODIUM AND ARGON. ARGON HAS MORE ELECTRONS IN OUTERMOST ORBIT THAN SODIUM THEREFORE NUCLEAR FORCE OF ATTRACTION BETWEEN ELECTRONS OF ARGON IS MORE THAN THAT OF SODIUM SO OUTERMOST ORBIT OR THE WHOLE ATOMIC RADIUS OF ARGON IS LESS THAN SODIUM.

ATOMIC RADIUS= DISTANCE BETWEEN NUCLEUS AND THE OUTERMOST ORBIT OF ATOM.