Question

Name the noble gas with 3 shells.

Answer 1

Understanding electronic configuration:

• The electronic configuration is written to describe the presence of electrons in different subshells of an atom.
• Based on various data obtained while writing the electronic configuration of an atom, the element is placed in the group and period to which the element must belong.
• The number of subshells depends upon the number of electrons.
• Argon is a noble gas that has 18 electrons and its electronic configuration is: $1s^2,2s^2,2p^6,3s^2,3p^6,$
• The above written electronic configuration shows that the maximum number of shells is 3.