Electron Configuration

Pauli Exclusion Principle

Electrons in an atom cannot have the same set of 4 quantum numbers

No orbital may have more than 2 electrons

Electrons in an orbital must have opposite

Valence Electrons

the electrons in the outermost shell of an atom

Hund’s rule

when filling orbitals of the same energy (degenerate orbitals), electrons will singly occupy each orbital with parallel spins before any orbital is doubly occupied

what are we learning about 

orbital, electron cofiguration.

S orbitas

Are spherical

#1 orbital max 2 electrons

P orbitals

Are like two balloons tied at the knot

#3 orbitals max 6 electrons

D orbitals

Are mainly like 4 balloons tied at the knot

#5 orbitals max 10 electrons

F Orbitals

Are mainly like 8 balloons tied at the knot

#7 orbitals max 14 electrons

Atomic Radius

Increases down group/Decreases across period

valence shell farther from nucleus

effective nuclear charge fairly similar

adding electrons to same valence shell

nuclear charge increases

Anions larger than neutral atom

Ionic Radius

Increases moving down the group and have the same charge

Higher valence shell=larger radius

Cations smaller than neutral atom