UniCalc
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Atomic shell
Wave-mechanical atomic model
radius of nth orbit
r
n
=
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
ordinal number of electron orbit (moving from nucleus)
n =
wavelength
λ =
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"