# Chapter 8 - Sections 8.1-8.9 - Exercises - Problems by Topic: 45a

$P: [Ne]3s^{2}3p^{3}$

#### Work Step by Step

Write the electron configuration of phosphorus using noble gas notation. By inspection of the periodic table, the noble gas preceding phosphorus is neon. Use brackets to denote these filled inner subshells. Then write the remaining subshells in the order in which they are filled.

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