Chem. test 2: Electron configuration

aufbau principle, Pauli exclusion principle, hund's rule, notations (long and shorthand/noble gas notation)

Main energy level

shells of an atom (= n, n= 1-7)

energy sublevel

levels inside the main energy level; spdf

Orbitals

where electrons are ; 2 e-/orbital

SPDF orbitals

1,3,5,7 (e- \= 2,6,10,14)

Electrons closer to the nucleus has; farther from nucleus has

lower energy; higher energy

electron configuration

arrangement of electron in atom

Aufbau Principle

electron fill the orbitals of lowest energy first

Pauli Exclusion Principle

only 2 electron/orbit and must have opposite spin

Hund's Rule

single electron of same spin fill the orbitals first then add second electron

shorthand notation/noble gas notation

replacing part of notation w/noble gas (row before) + period & group (of the element)

Example of Shorthand electron configuration

P=\[Ne\] 3s 2 3p 3