how do u know the orbital diagram for Mg?

Question

plz show ur work


thx

Answer 1

Mg has 12 electrons
we will fill them from lower orbitals to higher
one orbital needs 2 electrons to fill in
1s : one orbital, 12 electrons: 2e
2s : one orbital, 10 electrons : 2e
2p : three orbitals, 8 electrons : 6e
3s : one orbitals, 2 electrons : 2e

Several rules govern the placement of electrons in orbitals (electron configuration). The first dictates that no two electrons in an atom may have the same set of values of quantum numbers (this is the Pauli exclusion principle). These quantum numbers include the three that define orbitals, as well as (the hitherto unmentioned) s. Thus, two electrons may occupy a single orbital, so long as they have different values of s. However, only two electrons, because of their spin, can be associated with each orbital.

Additionally, an electron always tries to occupy the lowest possible energy state. It is possible for it to occupy any orbital so long as it does not violate the Pauli exclusion principle, but if lower-energy orbitals are available, this condition is unstable. The electron will eventually lose energy (by releasing a photon) and drop into the lower orbital. Thus, electrons fill orbitals in the order specified by the energy sequence given above.

So you will have to fill the electrons that have the same spin
every two electrons of an orbital have different spin but two electrons of two orbital can have the same spin

you can use a rectangle to represent for an orbital, an arrow to stand for an electron,( up or down is the spin of that electron )
good luck

Answer 2

First, look at the table. Mg is in 2A group, all 2A elements have their last electron in ns2 (n:1,2,3,4,5,6,7). If you know the Aufbau

1s2
2s2-2p6
3s2-3p6-3d10
4s2-4p6-4d10-4f14...

You will notice that Mg has 12 protons, if it is neutral, it has 12 electrons. You do the Aufbau until you get all 12 electrons.
1s2-2s2-2p6-3s2 (2+2+6+2= 12)
Remember, Aufbau has an order: 1s2-2s2-2p6-3s2-3p6-4s2-3d10-4p6-5s2... and so on.
s is only one orbital, p has 3 (since p = 1 in the azimutal number, the magnetic numbers are -1,0,1, giving 3 orbitals and 6 electrons tops)
d has 5 orbitals, f has 7...
(↑↓)-(↑↓)-(↑↓)(↑↓)(↑↓)-(↑↓)
1s2-/-2s2-/-------2p6-------/--3s2

As you can see, all s orbitals are (↑↓), but they can be (↑_) when they are not totally filled (remember, you can only put a max. 2 electrons per orbital. P has 3 orbitals, if they are all filled:
3*2= 6 electrons. If you count all arrows, you will notice you have 12, each ones represents an electron.
One thing you should know is that is more practical to just represent through orbital diagrams valence electrons, and use a noble gas Kernel for the rest. For Mg it would be
[Ne]-(↑↓)
--------3s2-
Hope it works!!!

Answer 3

Magnesium Orbital Diagram

Answer 4

Orbital Diagram For Magnesium

Answer 5

The electron orbital diagram for Mg is: Neon, and with 2 electrons in the outer ring. In other words, 2 in the 1st ring(now it is full) 8 in the second ring (now it is full) 2 in the outer ring.Mg is in column 2. That means that it has 2 electrons in the outer ring. It is in the 3rd period, that means that it has 3 rings of electrons.

Answer 6

Mg has 12 electrons.
it is in the 3rd period ,2nd group
so it will have 3 shells so s,p,d and 2 electrons in the last subshell
1s2,2s2,2p6,3s2,the p and d subshell will remain empty