Question

All the elements in a group in the periodic table have the same
(1) Atomic number
(2) Electronic configuration
(3) Atomic weight
(4) Number of electrons in the valence shell​

Answer 1

Answer:

(4) Number of electrons in the valence shell

Explanation:

The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.

Answer 2

Answer:

(4) Number of electrons in the valence shell are same in a group in periodic table.