Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

The ionization potential for second He electron is

Options:

13.6 eV

27.2 eV

54.4 eV

100 eV

Correct Answer:

54.4 eV

Explanation:

For the ionization of second He electron. He+ will act as hydrogen like atom. Hence ionization potential

$=Z^2 \times 13.6$ volt $=(2)^2 \times 13.6=54.4 V$