Question

6. Calculate the energy in eV of an electron in the 4th orbital of a helium atom. (2 marks

Answer 1

Answer:

First of all ,clarify which energy you want to calculate.

If we are taking about total energy then we know ,E=-13.6*[(Z/n)^2] eV . Where Z represent the atomic number of element and n represent the orbit of electron . So for this case Z=2 and n=4.

Potential energy of that electron will be twice as much as total energy.

Kinetic energy of electron will be negative of total energy