Lyman's series
filled energy sublevels
3, three, tres
some elements have unusual atomic orbitals
In krypton atoms, the 3s and 3p sublevels are filled, i.e. 3s23p6.
Atoms, like Neon (Ne), that have the s and p sublevels filled with either electrons are said to have an "octet" of electrons.
filled energy sublevels
3, three, tres
some elements have unusual atomic orbitals
In krypton atoms, the 3s and 3p sublevels are filled, i.e. 3s23p6.
The first 3 energy levels are filled, the 4s and 4p and 4d sublevels are filled, and the 5s and 5p sublevels are also filled. So only the first three energy levels are completely filled. The fourth and fifth energy levels are partly filled. The electron configuration is 1s22s22p63s23p63d104s24p64d105s25p6 or [Kr]4d105s25p6.
Each electron occupies the lowest energy orbital. Orbitals related to energy level are of equal energy.
Atoms, like Neon (Ne), that have the s and p sublevels filled with either electrons are said to have an "octet" of electrons.
All the noble elements to the far right of the periodic table have their s and P sublevels in their valence shell filled, hence they are nonreactive.
Argon is the noble gas in third period. In modern periodic table, it is in group 18. It bears [Ne] 3s2 3p6 electron configuration.
only five filled sublevels
they are all completely filled in the case of noble gases
s orbital for helium and p orbitals for other noble gases.