Compare Bohr model (orbits) and quantum mechanical model
(orbitals) of atom (look at
filling order
PowerPoint)
terms: orbital vs. orbit; (orbitals:
s, p,
d, f-orbitals) Pauli exclusion principle
(spin-up / spin-down); Aufbau principle (filling order from bottom of atom -->
out); Hund's rule (maximum number of occupied orbitals);
Demonstration: spring to show wave nature of light
Introduce quantum mechanical model of atom
orbit vs. orbitals
an orbit is a
fixed path an electron rotates in; an orbital is a probable region in space the
electron may be found in (e.g. s- p-, d-, f-orbitals)
write out electron configuration of first 20 elements.
Show 'crutch" for filling order
ENERGY LEVELS AND SUBLEVELS Objective: To state the energy sublevels within a
given energy level.
Objective: To state the maximum number of electrons that can occupy a
given energy level and sublevel. QUANTUM MECHANICAL MODEL OF THE ATOM Objective: To list the order of sublevels
according to increasing energy.
Objective: To write the predicted electron configurations for selected
elements.