# Homework Help: Uncertainty principle and hydrogen atom electron

1. Feb 23, 2009

### stickplot

1. The problem statement, all variables and given/known data

Using the uncertainty principle find the energy required for the electron to be confined inside the hydrogen atom. Use the radius of the atom 1 x 10-10 m for Δr. Express your answer in eV, rounded up to the nearest hundredth.

2. Relevant equations

ΔxΔp$$\geq$$h/4pie
x=position in space
p=momentum
3. The attempt at a solution

is is the radius of the atom=Δx? and if it is how do i get the momentum of the electron?

2. Feb 23, 2009