Question

the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p3. the atomic number of the element which is just below the above element in the periodic table is ________

Answer 1

e- p+ is that rule of this question

Answer 2

Answer: The element just below the given element is Arsenic.

Explanation:

The electronic configuration of the given element is $1s^22s^22p^63s^23p^3$

The element corresponding to above electronic configuration is Phosphorus. This element belongs to group 15 and period 3.

The element just below this is arsenic and it comes after the filling of 18 electrons due to the occurrence of transition elements (d-block).

The electronic configuration of arsenic is: $1s^22s^22p^63s^23p^64s^23d^{10}4p^3$

This element also belongs to Group 15 but lies in 4th period.

Hence, the element just below the given element is Arsenic.