Electron Configuration Flashcards
Definition of electron configuration
The distribution of electrons of an atom in atomic or molecular orbitals
Definition of sublevel
Set of orbitals having equivalent energy
Definition of orbital
Can contain a maximum of 2 electrons, inside a sublevel
Definition of atomic orbital diagram
Region of space where an electron is likely to be found
Pauli’s exclusion
The restriction on the placement of electrons into the same orbital, if two electrons occupy the same orbital they must have opposite spins
Hund’s rule
Electrons will pair up in an orbital only when all orbitals in the same sublevel have one electron, and when single electrons occupy different orbitals of the same sublevel they all have the same spin
Aufbau principle
The 1s (and other “s” orbitals) must be completely full before going onto the next orbital, and in general, the previous orbital must be full before going onto the next
Long electron configuration order
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d
Short configuration/noble gas abreviation
Can use noble gas & then continue the electron configuration, put the noble gas in brackets & then continue the
N number (principle quantum number)
Number of shells
Number of electrons in each sublevel
s: 2
p: 6
d: 10
f: 14
Valence electrons
Electrons in the outermost level (for bonding)
Definition of isoelectronic
When two atoms have the same amount of electrons
