Chemistry

posted by 0oooooooo0

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

a) State the number of electrons in the fourth shell/ level of ytterbium (1)

b)How many orbitals are there in the third shell of ytterbium? (1)


Please help I'm very confused

  1. bobpursley

    You have to go to the basics here. Do the electron configuration. The outer in Y is 5s25d1, before that {Kr}. So how many electrons in Kr?

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