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Electron Config
Term | Definition |
---|---|
Electron Configuration | the arrangement of electrons in the energy levels, sublevels and orbitals of atoms |
S orbitals | spherical orbitals; first to fill for any energy level; can only hold 2 electrons |
P orbitals | 3 mutually perpendicular dumbbell shaped orbitals; second to fill from 2nd energy level on up; can hold max of 6 electrons |
D orbitals | 5 orbitals of cloverleaf shape; third to fill for any energy level; beginning in the third shell, can hold a total of 10 electrons. |
F orbitals | their shapes are even more complex than s, p, or d orbitals; can hold a total of 14 electrons in 7 sub-shells; in the fourth and fifth energy levels |
Aufbau Principle | states that each electron occupies the lowest energy orbital available |
Pauli Exclusion Principle | maximum of two electrons may occupy an atomic orbital, but only if they have opposite spins |
Hund's Rule | electrons occupy equal energy orbitals so as to maximize the number of unpaired electrons |
Principle Energy Level | main energy level or distance of an electron from the nucleus; (n); correspond to the rows 1-7 on the Periodic Table |
Sublevels | regions within the energy levels; corresponds to the block grouping s,p,d,f on the Periodic Table |
spherical | s sublevel |
dumbbell | p sublevel |
clover | d sublevel |
double clover | f sublevel |
Orbital Notation | Uses circles to represent atomic orbitals with a label underneath to indicate sublevel and energy level |
Noble Gas | located in group 18 on the Periodic Table. |
Isoelectronic | two atoms that have the same number of electrons |
Valence Electrons | Electrons located in the outermost energy level |
n | Principle quantum number |
l | Angular momentum quantum number |
ml | Magnetic quantum number |
ms | Electron spin quantum number |