UNIT 3 TEST REVIEW : UNIT 3 TEST REVIEW Online Review
Quantum Mechanical Model : Quantum Mechanical Model The idea that electrons are in probable locations
There are primary quantum energy levels
There are sublevel orbital's in each of those energy levels
Each energy level has the same number of sublevels as the principle quantum energy level
EXAMPLE: N= 3, sublevels = 3s, 3p, 3d
Electron Configuration : Electron Configuration Make sure you know the orbital letters and what shape they stand for and how many orbitals are in each one.
S = 1 orbital
P = 3 orbital’s
D = 5 orbital’s
F = 7 orbital’s
Each Orbital can hold a max of 2 electrons, of opposite spins
Electron Configuration : Electron Configuration Know what shapes of oribitals can reside in each energy level.
What types of atomic orbitals are in the 3rd principle energy level?
s, p, and d only
Electron Configuration : Electron Configuration Know the definitions of the 3 principles for writing an electron configuration
Aufbau principle
Pauli Exclusioin principle
Hund’s Rule
Another principle that we did not discuss in class but is in your book is the:
Heisenberg uncertainty principle
Says its impossible to know both the velocity and position of a moving particle at the same time.
Electron Configuration : Electron Configuration Know how to write a COMPLETE, NOBLE GAS, and ORBITAL DIAGRAM for an element.
Also be able to tell what an element’s electron configuration looks like.
Complete electron configuration for P.
1s22s22p63s23p3
Noble gas configuration for Br.
[Ar] 4s23d104p5
Orbital Diagram for N.
Electron Configuration : Electron Configuration Know how to figure out maximum number of electrons
2n2
1st level = 2 electrons
2nd = 8
Etc.
Oribital Shapes : Oribital Shapes S = Sphere
P = Dumbell
D= Cloverleaf
EM SPECTRUM : EM SPECTRUM Know how the electromagnetic spectrum is arranged.
That is by wavelength
Shorter wavelength = higher frequency
Radio waves = low energy ( low freq/long wl)
Gamma rays = high energy ( High freq/Short wl)
Visible Light = Roy G. Biv
Red lowest energy, longest WL, low freq.
Violet highest energy, shortes WL, high freq.
Flame Test : Flame Test Each element has its own light signature
Light is emitted from element when its electrons go from an excited state back to the ground state.
Spectra : Spectra Continous
Absorption
Emission
What would be some uses of knowing the different elements spectra, and then looking at the spectra of other objects?