Categories: All - nuclear - electrons - atoms

by peter hill 14 years ago

689

Quanta to Quarks

Quanta to Quarks

Quanta to Quarks

Useful atom

Cobalt 60
Quarks

Change atom

Chadwick
Chinese Atomic Bomb
Neutron Dance Song
Nuclear Power

Wave atom

Experimental Diffraction

Classic atom

alpha
Subtopic
Rutherford

Bohr model

1. e- orbit + nucleus in 1/r^2 potential like planets.

a. circular orbits

b. does not radiate or decay

2. Electrons jump between orbits with photons E=hf

a. jump to closer orbit emit photon

b. jump to distant orbit absorb photon

(jump = disappear and rematterialize)

3. Orbits are restricted to l =nh/2p n = 1,2,3.....

(l is angular momentum = speed*mass * radius)

Summary of laws

Hydrogen lines

Explanation

HSC : 1/wavelength =R (1/n1^2-1/n2^2)

E(eV) = 13.6(1/n1^2- 1/n2^2)

wavelength = 91.15

(1/n1^2-1/n2^2)

= 91.15xn1^2xn2^2 / (n2^2-n1^2)