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

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?

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

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.

To determine the number of electrons in the fourth shell/level of ytterbium (Yb), you need to know its electron configuration.

The electron configuration of ytterbium is [Xe] 4f14 6s2.

In this electron configuration, it can be observed that the fourth shell/level contains the 4f subshell, which contains a total of 14 electrons.

Therefore, the number of electrons in the fourth shell/level of ytterbium is 14.

Answer: a) The number of electrons in the fourth shell/level of ytterbium is 14.

To find the number of electrons in the fourth shell/level of ytterbium (Yb), you need to determine its electron configuration.

The electron configuration of ytterbium is [Xe] 6s24f145d1. The [Xe] represents the electron configuration of xenon, which is the element that comes before ytterbium.

To determine the number of electrons in the fourth shell/level, you need to count the number of electrons in the 4s, 4p, and 4d orbitals. In ytterbium, there are no electrons in the 4s and 4p orbitals, but there is one electron in the 4d orbital.

So, the number of electrons in the fourth shell/level of ytterbium is 1.

To determine the number of orbitals in the third shell of ytterbium, you need to use the formula 2n^2, where n represents the principal quantum number (in this case, n=3).

Plugging in n=3 into the formula 2n^2, you get 2(3)^2 = 2(9) = 18.

Therefore, there are 18 orbitals in the third shell of ytterbium.