Question

what is the noble gas configuration for phosphorus? ne 3s2 3p3 na 3s2 3p5 ar 3p5 he 3s2 3p5 6/10

Explanation:

Step1: Recall phosphorus atomic number

Phosphorus has atomic number 15.

Step2: Write electron - configuration steps

First, noble - gas core before 3s and 3p is neon (Ne) which has 10 electrons. Then, for phosphorus, after the neon core, it has 5 more electrons which fill the 3s and 3p orbitals as 3s²3p³. So the noble - gas configuration is [Ne]3s²3p³.

Answer:

[Ne]3s²3p³