Chemistry Flashcards
mass number
p+n
energy of an electron
E= Rh - 1/ni ^2 - 1/nf ^2
same atomic number different mass number
isotope
avogadros number
6.01 x 10 ^23 moles
6 x 10 ^23 carbons atoms have a combined mass of 12 g
moles
Energy of a photon
E=hf
speed of light
3 x 10 ^8 m/s
speed of light equation
c= lambda f
filling of electrons
Hund’s Rule
impossible to know simult. position and momentum of an electron
Heisenburg uncertaintly principle
no two e- possess the same quantum numbers
Pauli Exclusion
max # of e- within a shell
2n^2
max # of e- in a subshell
4l+2
magnetic orbital quantum number
ml
azimuthal
l
unpaired e- align MF
paramagnetic
paired e- align MF causing parallel spins
para
unpaired e- repelled MF
Diamagnetic
E= -Rh 1/ni ^2 - i/nf ^2 and E is (-) is this emissions or absorption?
absorption
E= -Rh 1/ni ^2 - i/nf ^2 and E is (+) is this emissions or absorption?
emission
