Final Flashcards
Millikan experiments
Determined charge measurement of e-‘s
Neg charged oil and negatively charged plate
Describe the Thompson experiment and model
Cathode ray tube = negatively charged particles
Plum pudding model–negatively charged particles randomly dispersed in a positive cloud
Rutherford experiment and model
Alpha particle bombardment of metal foil
Lead to nuclear model of positive proton center
Isotope
Same atomic number bit different mass number
Where do atomic number and atomic mass go?
Atomic number is bottom left, atomic weight is upper left
Lambda nu=
Speed of light
Speed of light =
3.00 x 10^8 m/s
h =
Planck’s constant
6.626 x 10^-34 J/s
What happens when light strikes a metal surface
Electrons are emitted
Einstein suggested that electromagnetic radiation can be viewed as a
Stream of photons
The emission spectrum of H shows
Discrete wavelengths
What do the discrete wavelengths of the emission spectrum of H indicate?
That H has discrete energy levels
Orbitals are characterized by the quantum numbers
n, l, msubl
msubs describes e- spin
Pauli exclusion principal
No 2 e- in a given atom can have the same set of quantum numbers
Aufbau
Building up
Hund’s rule
Maximize spin
First , second, third ionization energy
The amount of energy required to remove the (highest, second highest etc) energy e- from a given atom
Ionization E _______ from left to right on the PTE
Increases
Ionization energy ________ going down a group
Decreases
E of a photon
Delta E = hn
E given in J per photon
Where h = Planck’s constant 6.626 x 10^-34 J/s
n = frequency in s-1
De broglies equation
Wavelength = Planck’s constant / mass x velocity
Atomic mass in g
The mass of one mole of an element
What is the root mean square velocity?
The avg of the squares of the velocity of the particles Square root of (3RT/M) Where R = 8.3145 J/K m T is in K M is the molar mass in kg/mol
Joule?
Kg m^2 / s^2
