1.

From the following elements : ""_(20)Ca,""_(3)Li,""_(11)Na,""_(10)Ne (a) Select the element which has two shells, both of which are completely filled with electrons. (b) Select two elements of the same group.

Answer»

Solution :Element in which two shells are completely filled with electrons is `""_(10)NE` (2, 8).
Two ELEMENTS of the same GROUP are `""_(3)LI` (2,1) and `""_(11)Na` (2,8, 1).


Discussion

No Comment Found