Nuclear Physics App

To calculate angular momentum, 2 popular formulas exist. They make up one of the most important postulates of Bohr's Atomic Model.
Select the formula you wish to use and click submit.

1.] Angular Momentum = Me x Ve x r

where Me = Mass of electron,
Ve = Velocity of the electron, &
r = Bohr's radius of that particular orbit

2.] Angular Momentum = (n x h ) / 2 π

where n = Principal Quantum Number,
h = Planck's Constant

The formula this app uses to compute Bohr's radius is the following:

Bohr's Radius = (n^2 x h^2 x ε0) / (π Me Z e^2)

where n = Principal Quantum Number,
h = Planck's Constant,
ε0 = Permitivity of Free Space,
Me = Mass of Electron,
Z = Atomic Number,
e = Charge on an electron

Calculate Bohrs radius:

Principal Quantum Number =
Atomic Number of Element =

To calculate the velocity of an electron in the nth permitted orbit, 2 popular formulas exist.
Select the formula you wish to use and click submit.

1.] Velocity of Electron = Z e^2 / 2 ϵ0 n h

where Z = Atomic Number,
e = Charge on an electron,
ϵ0 = Permitivity of free space,
n = Principal Quantum Number, &
h = Planck's Constant

2.] Velocity of Electron = (n x h ) / 2 π Me r

where n = Principal Quantum Number,
h = Planck's Constant,
Me = Mass of an electron, &
r = Bohr's Radius