1. Atoms and Nuclei

2. Nucleus radius: 1x10-15 Atom radius: 1x10-10
If the nucleus was the same size as the sun, how far would the electrons be from it?

3. Spectra (Hydrogen) 1/λ = R(1/N2 – 1/n2) R = 1.097x107 m-1
What are the min. and maximum values for the wavelengths emitted when hydrogen falls to the N=2 state (Balmer Series)

4. Bohr Model rn = (5.29x10-11) n2/Z (m) En = (-2.18x10-18) Z2/n2 (J)
En = (-13.6) Z2/n2 (eV)
Z = Atomic #
n = orbital #

5. Bohr Model F = kq1q/r2 and ac = v2/r.
Since F = ma, we have kQq/r2 = mv2/r.
Thus mv2 = kQq/r.
This means that 2KE = -EPE

6. Quantum Physics

7. Nuclear Structure A = Z + N
A = nucleon # or atomic mass number
Z = number of protons
N = number of neutrons
r = (1.2 x 10-15)* A1/3 m
The density of nuclei are approx. the same.

8. Nuclear Fission/Fusion E = mc2

9. Radioactivity
U Th + H Th Pa + e P P + γ