Question

A single electron orbits a stationary nucleus(z=5).The energy required to excite the electron from the third to the fourth bohr orbit will be:
(1)4.5ev
(2)8.53ev
(3)25ev
(4)16.53ev

Answer 1

Answer:

The ground ionisation energy of hydrogen is :

Explanation:

13.6eV

En = - 13.6 × Z²/n²

E = E₄ - E₃

E = - 13.6 × 5² {1/4² - 1/3²)

E = - 13.6 × 25 × {-7/144}

= 16.53eV

Answer 2

Answer:

correct answer of you pls mark as brain list