Question

energy of electron in second orbit of hydrogen atom is e2 the energy of electron in third of helium atom will be​

Answer 1

Answer:

Energy of electron in 3rd orbit of Helium = ?

Explanation:

∴We know that the energy of an electron in the orbit of an atom is directly proportional to  

i.e.  Energy      

Or , Energy

where z is atomic no. , n is the orbit in which electron is present and k is constant.

So,  E

Now the energy of electron in 3rd orbit of He atom is :

              ∴()

So the energy of electron in 3rd orbit of He is .