Bohr Model Flashcards
What is the equation for the inverse relationship between frequency and wavelength?
Variables h = Planck's constant v = frequency λ = wavelength E = energy c = speed of light
c = vλ
What was the very first atomic model and who created it?
A sphere that cannot be broken down
Democritus
Who came up with the plum-pudding model and what did this model represent?
Thomson
Electrons are in a positive matrix
What was Rutherford’s model?
Nucleus is center of positive charge; electrons orbit the nucleus
Who introduced the idea of quantum mechanics?
Max Planck
What is quanta?
Discreet intervals that energy is released and absorbed into
What is Planck’s constant?
6.626*10^34
What three main points did the Bohr model cover?
- Only orbits of exact radii are permitted.
- An “allowed state” is one in which an electron has specific energy.
- As electrons move between “allowed states”, a photon of energy is absorbed or emitted by the atom.
What did scientists find when they studied the emission spectra of elements?
Found that elements emit unique wavelengths of light
What is a photon?
A discreet packet of energy
What is the photoelectric effect?
When a photon hits an electron with enough energy to knock it loose.
Why do light waves need to prevent constructive and destructive interference?
To prevent the light waves from canceling each other out.
