Question

. What is the energy of the photon required to
promote an electron in He+ from a 1s orbital to a 2p-orbital plz answer quickly ​

Answer 1

The energy of the photon required to  promote an electron in He+ from a 1s orbital to a 2p-orbital is E = 3hRc

Explanation:

Formula:

1/λ = Rz² [1/n²₁ - 1/n²₂ ]

1/λ = Rz² [1/1 ²- 1/2²]

1/λ = Rz² [ 1/1 - 1/4]

1/λ = Rz² [4 - 1 /4 ]

1/λ = Rz² [3/4]

1/λ = R4 [ 3/4]

1/λ = 3R

c = λ r

c = 1/3R ×r

r = 3Rc

E = h.r

E = 3hRc