Question

13.
The elements in a vertical column
exhibit similar chemical behaviour. This
is because .......
(a) these elements have the same
number of electrons in their outermost
orbitals
(b) these elements have the different
number of electrons in their
outermost orbitals
(c) these elements have no electrons in
their outermost orbitals
(d) None of the above
​

Answer 1

Answer:

option a

Explanation:

explanation is already given

Answer 2

Answer:

these elements have same no. of electrons in their Valence shell.

Explanation:

because the chemical properties depend on the no. of Valence electrons.