Valence Electrons in Holmium (Ho)

Valence Electrons in Holmium

Determine the number of valence electrons in Holmium (Ho, Element 67)

Step 1: Look up the electronic configuration for Holmium

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

[Xe] 4f¹¹ 6s²

Calculate Electronic Configuration for Holmium

Step 2: Identify the outermost electrons using the electronic configuration

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

4f¹¹ 6s²

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:

The outermost electrons with the largest principal quantum number (in this case, n = 6) are valence electrons.

Answer

Holmium (Ho) has 2 valence electron(s).