Valence Electrons in Lawrencium (Lr)

Calculate the number of valence electrons in Lawrencium 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 Lawrencium

Determine the number of valence electrons in Lawrencium (Lr, Element 103)

Step 1: Look up the electronic configuration for Lawrencium

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

[Rn] 5f14 7s2 7p1

Calculate Electronic Configuration for Lawrencium

Step 2: Identify the outermost electrons using the electronic configuration

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

5f14 7s2 7p1

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 = 7) are valence electrons.


Lawrencium (Lr) has 3 (2 + 1) valence electrons.

Lewis Dot for Lr