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

Question

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

Chemistry - bobpursley Saturday, September 30, 2017 at 10:50am
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?

Answer 1

I just dont understand this I know that
ytterbium has the electron configuration:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14

but I dont know anything else apart from that so I dont understand what Bob means by outer or anything about the shells or orbitals. Please help.

I know Kr has 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 so that means
[Kr] 5s2 4d10 5p6 6s2 4f14 is ytterbium elsectron configuration dont know anything else to do with this question please help

Answer 2

a. You are in trouble. You dont know what outer means? You dont know what 4th means?

State the number of electrons in the fourth shell/ level of ytterbium (1) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 count them: 2+6+10+14
How many orbitals are there in the third shell of ytterbium? (1)
you have 3s, 3p, and 3d. 18, in three orbital shapes.