2006-12-17 07:44:19 · 6 answers · asked by messanger 1 in Science & Mathematics ➔ Chemistry
in atom, no two electron can have same set of four quantum numbers. another way stating this : an orbital may contain at most four electrons and they must have opposite spin.
2006-12-17 07:47:49 · answer #1 · answered by ibrar 4 · 2⤊ 0⤋
A complex quantum theory basically stating that no two electrons in the electron cloud of any given atom cannot have the same 4 quantum numbers. Quantum numbers are a way of describing the energy state of an electron. The four quantum numbers (actually letters) are N, L, M(l) and M(s). They describe the principle, azimuthal, magnetic, and spin quantum numbers, respectively. Simply they describe the oribtial shell, subshell, energy shift, and spin values for a given electron.
For an example, if we find two electrons in the 2p(xy) subshell (as we do for an atom whose atomic number is greater than 8) these two electron must have opposite M(s) quantum numbers. Since there are only two values for this number (spin), 1/2 and -1/2, they must be opposite in spin. In gen chem this is described by arrows pointing up and down as spin. So you can't have two arrows pointing up or down in the same subshell node.
2006-12-17 16:02:04 · answer #2 · answered by Ross P 3 · 2⤊ 0⤋
No electron orbital can have more than 2 electrons in it (that's the short form).
In reality, "no two electrons can have the same set of the four quantum numbers (n,l,m,s).
There is only 1 orbital called "s" so you can only put 2 electrons in it.
There are 3 orbitals called "p" (p(x), p(y), p(z)) and you can only put 2 electrons in each for a total of 6.
There are 5 orbitals called "d" (d(xy), d(xz), d(yz), d(z2), d(x2-y2))
and you can only put 2 electrons in each for a total of 10.
There are 7 orbitals called "f" (trust me!) and you can only put 2 electrons in each for a total of 14.
2006-12-17 16:44:31 · answer #3 · answered by The Old Professor 5 · 1⤊ 0⤋
no two electrons can have the same set of quantum numbers
or in lamens terms..
in an orbital, there is a max of two electrons per orbital in pairs and both electrons must have the opposite spin
2006-12-17 17:20:02 · answer #4 · answered by k soni 2 · 0⤊ 0⤋
No two electrons (or genrally 2 fermions) can occupy the same state. So if electron a has it's spin up then for b to pair with it, it will have to have its spin down
2006-12-17 15:49:33 · answer #5 · answered by Boehme, J 2 · 1⤊ 0⤋
it means i dont know
2006-12-17 15:47:47 · answer #6 · answered by Blesson 2 · 0⤊ 2⤋