Calculate the number of valence electrons in Lanthanum using its electron configuration step by step.
Determine the number of valence electrons in Lanthanum (La, Element 57)
The abbreviated (condensed) ground electronic configuration for Lanthanum is:
[Xe] 5d1 6s2
Electrons in atomic orbitals outside the [Xe] core are the outermost electrons:
Extract the principle quantum number, n, and number of electrons from the electron configuration:
|Electron Configuration||n||Orbital||Number of Electrons|
The outermost electrons with the largest principal quantum number (in this case, n = 6) are valence electrons.
Lanthanum (La) has 2 valence electron(s).