question_answer

Which combination of statements is correct?

i. Magnesium and calcium are the elements whose atoms have two electrons in their outermost shell.

ii. The atomic radius decreases on moving from left to right in the period of the periodic table.

iii. The elements in a group have consecutive atomic numbers.

iv. On going from left to right on a period of periodic table, the tendency to gain electrons increases.

v. It is possible to have an elements with atomic numbers 3.5.

A) i, ii, and v

B) i, iv and v

C) i, ii and iv

D)  ii, iv and v

E)  ii, iv and v