Question

Calculate the energy of photon required to raise an e- in hydrogen atom from n =1 to n=3 energy level

Answer 1

Explanation:

Energy of e

−

in n

th

shell =−13.6

n

2

τ

2

For H−atom with n=3→E=−13.6×

9

1

⇒E=

9

1

(Energy of e

−

in first shell)

⇒E=

9

1

×2.18×10

−18

⇒E=2.42×10

−19

J(Ionisation Energy= Energy of e

−

in first shell)