Question

The value of ionisation energy of the hydrogen atom is

• A. $3.4\,eV$
• B. $10.4\,eV$
• C. $12.09\,eV$
• D. $13.6\,eV$

Answer 1

Answer: (D)

$13.6\,eV$

Answer 2

The minimum energy required to free the electron from the ground state of the hydrogen atom is called the ionisation energy of hydrogen atom, its value is $13.6\, eV$.