The Exclusion Principle and the Periodic Table
8.2 The Exclusion Principle and the Periodic Table
Learning Objectives
- Explain the importance of Pauli’s exclusion principle to an understanding of atomic structure and molecular bonding
- Explain the structure of the periodic table in terms of the total energy, orbital angular momentum, and spin of individual electrons in an atom
- Describe the electron configuration of atoms in the periodic table
Discuss!
Why is the 1s electron more tightly bound in a multi-electron atom than in H?
Pauli Exclusion Principle
The Periodic Table
Practice!
| Practice 8.2.1 |
|---|
| The Pauli Exclusion Principle states |
| A. no two electrons in the same atom can have the same set of quantum numbers. |
| B. there is an inherent uncertainty in the position and momentum of a particle. |
| C. when an atom has orbitals of equal energy, the maximum number of electrons will have unpaired spins. |
| D. when an atom has orbitals of equal energy, the maximum number of electrons will be paired spins. |
| E. no two atoms can have the same set of quantum numbers. |
| Practice 8.2.2 |
|---|
| The ground state configuration of chlorine (Z = 17) is |
| A. 1s2 2s2 2p5 3s2 3p6 |
| B. 1s2 2s2 2p6 3s2 3p5 |
| C. 1s2 2s2 2p6 3s2 3p4 3d1 |
| D. 1s2 2s2 2p6 3s2 3p5 4s1 |
| E. 1s2 2s2 2p6 3s1 3p7 |
| Practice 8.2.3 |
|---|
| Rubidium (Z = 37) and potassium (Z = 19) are similar to sodium in that they have ____ electron(s) in the outermost shell |
| A. five p |
| B. three p |
| C. two s |
| D. one d |
| E. one s |
Physics Education Research at UNG 