Quanta to Quarks

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Chemical Nomenclature

by NA - 10SP - Castlebrooke SS (2692)

Concepts and ideas

by Shana Beggs

Elements

by Woon Kiat

Chemical Bonds

by Hailey Ricketts

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)