Bohr Model

Question 1

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

Answer 1

c = vλ

Question 2

What was the very first atomic model and who created it?

Answer 2

A sphere that cannot be broken down

Democritus

Question 3

Who came up with the plum-pudding model and what did this model represent?

Answer 3

Thomson

Electrons are in a positive matrix

Question 4

What was Rutherford’s model?

Answer 4

Nucleus is center of positive charge; electrons orbit the nucleus

Question 5

Who introduced the idea of quantum mechanics?

Answer 5

Max Planck

Question 6

What is quanta?

Answer 6

Discreet intervals that energy is released and absorbed into

Question 7

What is Planck’s constant?

Answer 7

6.626*10^34

Question 8

What three main points did the Bohr model cover?

Answer 8

1. Only orbits of exact radii are permitted.
2. An “allowed state” is one in which an electron has specific energy.
3. As electrons move between “allowed states”, a photon of energy is absorbed or emitted by the atom.

Question 9

What did scientists find when they studied the emission spectra of elements?

Answer 9

Found that elements emit unique wavelengths of light

Question 10

What is a photon?

Answer 10

A discreet packet of energy

Question 11

What is the photoelectric effect?

Answer 11

When a photon hits an electron with enough energy to knock it loose.

Question 12

Why do light waves need to prevent constructive and destructive interference?

Answer 12

To prevent the light waves from canceling each other out.