Question

calculate the first excitation eneandrgy of electron in hydrogen atom ​

Answer 1

Hydrogen has only one electron present in its very first shell.

Now, energy of an electron in nth orbit is given by

En = −13.6n2 eV

For, ground state of Hydrogen, n = 1.

So, energy of ground state = -13.6 eV

Now, first excitation means electron jumps from first shell to second shell.

So, energy associated with the second shell is the first excitation energy.

So, first excitation energy = Energy of second shell = −13.622= −3.4 eV