Question

An element belongs to Group 17 and the third period of the periodic table. Write the following:

Its electronic configuration.

Answer 1

Electronic configuration:

1. The arrangement of electrons in the atomic orbitals of elements is characterized by electronic configuration.
2. The atomic numbers are filled in the K shell which can bear up to 2 electrons, the L shell which can bear up to 8 electrons and the M shell which can bear up to 18 electrons and so on.
3. The electronic configuration of the element (chlorine) is $\mathrm{Cl}\to 2,8,7$