Two. The ground state configuration of Sulfur is [Ne] 3s23p4. According to Hund's rule, the p orbitals must fill up separately first. This results in the first 3 electrons going into separate orbitals, and the fourth then doubles up with the first, leaving the other two p orbitals with unpaired electrons.
There are 2 unpaired electrons.
There are 8 electrons in a grounded oxygen atom, filling the 1s and 2s sublevels.
That leaves 4 unpaired electrons which go into the 2p sublevel. Electrons only pair when there are no empty orbitals in a sublevel. There are 3 orbitals in the 2p sublevel so 3 of the 4 electrons go into 3 of the orbitals and the fourth electron pairs itself in one of the orbitals leaving 2 electrons unpaired in the other orbitals.
Here is a pseudo-orbital diagram notation:
[-> <-] [-> <-] [-> <-| -> | ->]
1s 2s 2p
*The arrows represent the ions and their spins.
2
3 unpaired electrons
That would be 0. The ground state of every element except for Hydrogen is 1s2 which has no unpaired electrons. (only valence electrons have the ability to be unpaired). Full configuation of Fe would be: 1s2 2s2 2p6 3s2 3p6 4s2 3d6 WWWWWWWWWRRRRRRROOOOOOONNNNNNGGGGGGG!!!!!!!
There should not be any unpaired valence electrons in a pure sample of Fe2O3: This substance is composed of Fe+3 cations and O-2 anions, in which all of the originally unpaired valence electrons in Fe and O atoms have become paired. Since Fe is a transition element, there may or may not be unpaired non-valence electrons in its inner shells.
A neutral silicon atom will have 14 electrons, one for each proton in its nucleus. A link follows and can be found below.
5 valence electrons exist in bromine period, at ground state bromine has 3 valence electrons
3 unpaired electrons
An atom of antimony in its ground state has 3 unpaired electrons.
There are 5 unpaired electrons in Fe^3+ in its ground state.
Not in its ground state.
Silicon has 2 electrons in the 3p sublevel in its ground state. Silicon's full electron configuration is: 1s2 2s2 2p6 3s2 3p2.
1 unpaired electron
There are 5 unpaired electrons in Fe^3+ in its ground state.
Magnesium has five unpaired electrons and is therefor paramagnetic
Hund's Rule
0
Two
Add the electrons in accordance with the aufbau principle and then count the unpaired ones.