Valence Electrons in Phosphorus (P)

Calculate the number of valence electrons in Phosphorus using its electron configuration step by step.

Enter the atomic number or symbol of any element, and this calculator will calculate its valence electrons with steps.

Valence Electrons in Phosphorus

Determine the number of valence electrons in Phosphorus (P, Element 15)

Step 1: Look up the electronic configuration for Phosphorus

The abbreviated (condensed) ground electronic configuration for Phosphorus is:

[Ne] 3s2 3p3

Calculate Electronic Configuration for Phosphorus

Step 2: Identify the outermost electrons using the electronic configuration

Electrons in atomic orbitals outside the [Ne] core are the outermost electrons:

3s2 3p3

Step 3: Use the principle quantum number to identify the valence electrons

Extract the principle quantum number, n, and number of electrons from the electron configuration:

Electron ConfigurationnOrbitalNumber of Electrons

The outermost electrons with the largest principal quantum number (in this case, n = 3) are valence electrons.


Phosphorus (P) has 5 (2 + 3) valence electrons.

Lewis Dot for P