A, B, C are three elements with atomic numbers, `Z-1, Z " and " Z + 1` respectively. B is an inert gas. Answer the follwing questions.
Which of the three has least value of ionization energy?

A, B, C are three elements with atomic numbers, Z-1, Z " and " Z + 1 respectively. B is an inert gas. Answer the follwing questions. Predict the group of A and C.

Three elements X , Y and Z have atomic numbers 19 , 37 and 55 respectively . Then the correct statements (s) is / are

" If Z\inC satisfies |z|>=3 then the least value of |z+(1)/(z)| is

The atomic numbers of elements A,B,C and D are Z - 1, Z, Z + 1 and Z + 2 respectively. If B is a noble gas, choose the correct statement among the following statements : I. A has higher electron affinity. II. C exists in +2 oxidation state. III. D is an alkaline earth metal.