Question

The energy associated with the first orbit in the hydrogen atom is –2.18 × 10–18 J atom–1. What is the energy associated with the fifth orbit

Answer 1

Explanation:

(i) The expression for the energy associated with nth orbit in hydrogen atom is En -2.17 x 10-18 n² J/atom.

The energy associated with fifth orbit is En -2.17 x 10-18 52 = J/atom= -8.68 x

10-20 J.

(ii) The radius of Bohr's nth orbit is given by the expression r₂ = 0.0529n² nm.

For fifth orbit, the radius is r5 = 0.0529 x 5² nm 1.3225 nm.