Asked by cake

Ytterbium, atomic number, 70 is the first element in the periodic table to have the first four shells full.

work out the number of electrons in the fourth shell/ level of ytterbium?

Please show all working out with no abbreviations and please help
Answered by cake
Ytterbium
Electronic configuration

Electronic configuration
1s22s22p63s23p63d104s24p64d105s25p64f145d106s2
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