add section on particle / nuclear

[landgreen]

issues
already covered in chemistry?
no synergy with other physics sections
except quantum

nuclear
subatomic particles
particle properties
charge, mass, spin
nuclear equations (conservation of charge, lepton number, energy, ...)
alpha, beta, gamma radiation

standard model
boson vs. fermion
force carrier particles
4 fundamental forces

weak nuclear force
radioactivity

strong nuclear force
nuclear forces
nuclear stability

half-life
nuclear fission
nuclear fusion
nuclear power

front page layout
make a section for:
particles
quantum

move units, vectors to motion section