Question

Which ion below has the largest radius?

1. Na
2. F-1
3. Mg+2
4. O-2
5. Na+1

Answer 1

Which is bigger F or Na+?

Explanation: The ionic radius of fluoride ion is bigger then that its parent atom. This is because when fluorine atom gains an electron number of electrons becomes more than the number of protons due to which effective nuclear charge on valence electrons decreases and resulting in increase in size of an ion