Electron Spin and the Pauli Exclusion Principle N N “Antiparallel' AE External X3aug N S magnetic N field s N No external "Parallel" magnetic field
Electron Spin and the Pauli Exclusion Principle
Electron Spin and the Pauli Exclusion Principle Fact:Experiment Beam of atoms Slit Beam collector Magnet plate
Electron Spin Electron Spin and the Pauli Exclusion Principle Fact: Experiment
Pauli's Exclusion Principle 4.Spin quantum number ms: 1 m, 2 Pauli's Exclusion Principle No two electrons can have the same set of 4 quantum Wolfgang Pauli numbers. Nobel Prize in Physics(1945) Each atomic orbital has capacity for 2 electrons
4. Spin quantum number ms: 1 2 m s = ± Pauli’s Exclusion Principle Pauli’s Exclusion Principle No two electrons can have the same set of 4 quantum numbers. Each atomic orbital has capacity for 2 electrons Wolfgang Pauli Nobel Prize in Physics (1945)
Pauli's Exclusion Principle No two electrons in the same atom can have the same set of four quantum numbers:n,l,m and m Question:which orbital is occupied by an electron which has the following set of quantum numbers in one atom: n1,m1m=(3,2,1,+)? N=3,l=2→d→3d Answer:one of the five 3d orbitals (such as 3d) Question:Give all possible sets of 4 reasonable quantum numbers corresponding to an electron which is located in 4px orbital of an atom.(n,1,m,m)=(?,??? One of(4,1,+L,+,(4,1,+L,-,4,1,0,+),(4,1,0,-), 4,1,-1,+,(4,1,-1,-
No two electrons in the same atom can have the same set of four quantum numbers : n, l, ml and ms Question: which orbital is occupied by an electron which has the following set of quantum numbers in one atom: (n, l, ml m s) =(3, 2, 1, +½)? Pauli’s Exclusion Principle N=3, l= 2 d 3d Question: Give all possible sets of 4 reasonable quantum numbers corresponding to an electron which is located in 4p x orbital of an atom. (n, l, ml , m s) = (?, ?, ?, ?) N=3, l= 2 d 3d Answer: one of the five 3d orbitals (such as 3dxy) One of (4, 1, +1, +½) , (4, 1, +1, One of (4, 1, +1, +½) , (4, 1, +1, -½) , (4, 1, 0, +½), (4, ½) , (4, 1, 0, +½), (4, 1, 0, -½), 1, 0, ½), (4, 1, -1, +½) , (4, 1, 1, +½) , (4, 1, -1, -½)
Electron Which room I should stay? 19K Neutron Orbital Nucleus Proton Elect Iow跳a7mJy electron(s)will live in my room?
19K Electron Orbital