Energy Levels: What Happens if First Level Contains More Than 2 Electrons?

[ahiazaa]

Hi every body and how do you do

first sorry of my weak language because I'm new physical Researcher at KACST & I'm learn English now before go to master degree


so my physical question is about the number of electrons in the first level of energy levels
we know the the first level can't contain more than 2 electrons
I' asking my self what will be happens if the it more than 2


so what do think if the first level contains more than 2 electrons

 

[Speed Hawk]

According to Pauli's exclusion principle, two fermions cannot have same energy levels. As electron is a fermion, two electrons cannot have all the quantum numbers same (If all the quantum numbers are same then they are of same energy level). Two electrons in the lowest level have first three quantum numbers same but they differ in spin quantum number.

 

[ArjenDijksman]

Hi every body and how do you do
so my physical question is about the number of electrons in the first level of energy levels
we know the the first level can't contain more than 2 electrons
I' asking my self what will be happens if the it more than 2

I consider the Pauli exclusion principle as a special case of a very general principle of Nature: two make a pair. And in order to make a pair, the two must "fit" or "bind" together. For electrons, this fitting or binding means being opposite in spin.

So regarding your question of what happens if you try to put more than two electrons in the first energy level (1s orbital), three can't make a pair. So you first need to break the bond between the two electrons, ejecting one of them to a higher energy level, before you can replace it with another electron.