The Correct Sequence  of Atomic Radii Is

Which among the following species has the same number of electrons in its outermost as well as penultimate shell?

The statement that is not correct for periodic classification of elements is

The electronic configuration of Gadolinium (At. No. 64) is

The first ionization potential (eV) of Be and B respectively are

Which of the following remains unchanged on descending a group in the periodic table

The radii of F, F^–, O and O^2– are in the order of

Point out the wrong statement, in a given period of the periodic table, thes-block elements has, in general, a lower value of 

Electronic configuration of most electronegative element is 

The bond length in LiF will be