The ionization energy of atomic hydrogen?

[lucky_star]

Homework Statement

According to the Bohr theory, what is the ionization energy of atomic hydrogen in kJ/mol?

Homework Equations

Bohr equation: E = (-2.18 x 10^-18 J)(1/n²)

The Attempt at a Solution

I don't have any general idea on how to do this problem :( please help!

The answer is: 1.31 x 10³ kJ/mol

 

[Borek]

You need to use Rydberg formula. Note, that it can be easily derived from what you called Bohr equation.

Alternatively - what n means? What value does it have in unexcited hydrogen atom? What values does it take when atom gets ionized? These two n values give you two energies - that of unexcited and that of ionized atom. What is the difference between them?

But it boils to exactly the same.