00:01
And this question says that we need to write out the orbital diagram that represents the ground state of arsenic, then how many unpaired electrons are there? so know that arsenic, as is atomic number 33, half an electron configuration of 1s2, 2 s2, 2p6, 3s2, 3p6, 4s2, 3d10, and then 4p3.
00:36
So let's dwarf our orbital diagram for it.
00:41
So our 1s2, ben like this, our 2 s2, ben like this, our 2p2, our 2 paces, our 3 s2, our 3p3 we can see that our 4p3 will have 3 impaired electrons.
02:12
So therefore we have three impaired electrons in arsenic.
02:24
Three impaired electrons in arsenic.
02:28
And the second part of the questions, it says that how many of the following elements have one unpaired electron in its ground state? so we have boron.
02:38
So boron will have an electron configuration of 1s2, 2s2 and then 2p1...