Thulium has an electronic configuration of [Xe] 4f136s2
You could count either 2 or 15. The concept of valence electrons is almost meaningless when applied to the lanthanides. Thulium is a typical member of these and has one common oxidation state, +3
Well, isn't Thulium a fascinating element? It has 69 protons and 69 electrons. Just imagine those little particles dancing around, creating the unique properties that make Thulium so special. Embrace the beauty of science, my friend!
69 protons, 69 electrons Thulium-169 isotope has 100 neutrons
Indium has 3 valence electrons.
8 valence electrons- 1s22s2p63s2p6
Zinc has two valence electrons.
5 valence electrons.
Aluminum has 3 valence electrons.
Beryllium has two valence electrons.
3 valence electrons
There are 3 valence electrons in an atom of aluminium.
There are no valence electrons.
Lead has 4 valence electrons.