Question

write the complete ground - state electron configuration of cl.
for multi - digit superscripts or coefficients, use each number in succession

Explanation:

Step1: Determine the atomic number of Cl

The atomic number of Cl (chlorine) is 17. So, a neutral Cl atom has 17 electrons.

Step2: Fill the orbitals according to the Aufbau principle

• The 1s orbital can hold 2 electrons: \(1s^{2}\)
• The 2s orbital can hold 2 electrons: \(2s^{2}\)
• The 2p orbital can hold 6 electrons: \(2p^{6}\)
• The 3s orbital can hold 2 electrons: \(3s^{2}\)
• The remaining \(17-(2 + 2+6 + 2)=5\) electrons go into the 3p orbital: \(3p^{5}\)

Answer:

\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\)