Question

When elements are placed in the order of their increasing atomic number, the elements having the same number of valence shell electrons is repeated in such a way, so as to fall under :

• A. same group
• B. different group
• C. same period
• D. different period

Answer 1

The correct option is A same group

When elements are placed in the order of their increasing atomic number, the elements having the same number of valence shell electrons is repeated in such a way, so as to fall under the same group.

Since the electronic configuration of the valence shell electrons is same they show similar properties.

Hence option A is correct.