Question

write the increasing order of size of Na ,Na+,F, F+?

Answer 1

Answer:

Explanation:

And the only reasonable definition is by ATOMIC or IONIC RADIUS. We know that (i) atomic radius decreases ACROSS a Period from left to right as we face the Table; and (ii) atomic radius INCREASES down a Group, a column of the Periodic Table. Why?

Well, atomic size depends on electronic radius, and INCOMPLETE electronic shells shield the nuclear charge very ineffectively. And thus across the Period atomic size decreases. Once the shell is full, however, shielding of nuclear charge becomes relatively effective, and the next Period builds on a new valence shell that is farther removed from the nucleus.