00:02
Hi there.
00:03
In this question, we are working with electron configurations and specifically with tullurium.
00:10
Well, looking at the periodic table, we see that tullarium is atomic number 52.
00:15
So that means it has 52 protons, but more importantly, for us for this question, if it has 52 protons and it's a neutral atom, it also has 52 electrons.
00:28
So we want to write the electron configuration for 52 electrons.
00:33
All right, so we write these in order of increasing energy.
00:38
So we're always starting with 1s, so we'll be 1s 2, followed by 2s, and the s orbital again can hold 2.
00:46
So we just need to keep going like this until we get to 52 electrons.
00:51
The superscripts there represent the number of electrons.
00:54
So after 2s comes 2p, and the piece can hold 6.
00:59
Then we fill 3s, which can hold 2 and 3p, which can hold 6.
01:06
After 3p in terms of energy comes 4s, which holds 2, and then 3d comes after that.
01:15
And being a d, it can hold a total of 10.
01:20
After that comes 4p, and being a p, it holds 6.
01:25
So if we count real quickly here, we see we're up to 10, 12, 18, 20, 36 electrons...