The Trivalent Ion Having Largest Size In Lanthanide Series Is

Mendeleef’s Periodic Table is upset by the fact that

If Aufbau rule is not followed, K-19 will be placed in

Which of the following has largest size?

Which of the following has largest ionic radius?

Which of the following ion is the smallest ion?

Which of the following is the smallest in size?

The smallest among the following ions is

In the isoelectronic species the ionic radii (Å) of N^3–, O^2– and F^– are respectively given by   

Which of the following elements will have the lowest first ionisation energy?

A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration