Circular Motion with a hydrogen atom

[all_relative]

Homework Statement

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.01e6 m/s.
Find the central force acting on the electron as it revolves in a circular orbit of radius 4.84e-11 m.
Answer in units of N.

Homework Equations

Fc=m*v^2/R

The Attempt at a Solution

I said that the mass was 1.674e-27 kg. If i should use another number, please let me know.

Fc=m*v^2/R
Fc=(1.674e-27)*(2.01e6)^2/(4.84e-11)
Fc=1.39e-4

When I submit this answer to UTexas (an online HW service) it says that I am wrong. I have done this problem several times and keep getting the same thing.

Thanks!

 

[hage567]

Homework Statement

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.01e6 m/s.
Find the central force acting on the electron as it revolves in a circular orbit of radius 4.84e-11 m.
Answer in units of N.

Homework Equations

Fc=m*v^2/R

The Attempt at a Solution

I said that the mass was 1.674e-27 kg. If i should use another number, please let me know.

Fc=m*v^2/R
Fc=(1.674e-27)*(2.01e6)^2/(4.84e-11)
Fc=1.39e-4

When I submit this answer to UTexas (an online HW service) it says that I am wrong. I have done this problem several times and keep getting the same thing.

Thanks!

You are not using the right value for the mass.

 

[all_relative]

You are not using the right value for the mass.

What is the correct value for the mass?
I looked it up on Google and that is what I found.

Thanks.

 

[hage567]

You are looking for the mass of an electron. Is that what you googled?