Gen. Chem Flashcards
Atomic mass unit
amu
atomic number
Z
mass number
A
Isotopes
atoms that share an atomic numbers but have different mass numbers
Carbon (12,6)
Z=6 ( 3 naturally occurring isotopes)
12= 6 protons and 6 neurons
Mass of electron
1/2000 that of a proton
As electrons go from lower energy lever to higher energy level they get AHED: What does AHED stand for?
Absorb light
Higher potential
Excited
Distance (from the nucleus)
Maximum number of electrons in a subshell
4l+2
L subshell
specifies the shape of subshell
(s,p,d,f,g)
Magnetic quantum number (ml)
-1,0,+1
Spin quantum number (ms)
+1/2,-1/2
Planck relation (frequency)
E=hf
Angular momentum of an electron (Bohr model)
L=nh/2(pi)
Energy of electron (Bohr model)
E= - R (H)/n^2
Planck relation ( wavelength)
E= hc/(y)
y= wave frequency