Question

The ionization potential for second he electron is.

• A. 13.6 eV
• B. 27.2 eV
• C. 54.4 eV
• D. 100 eV

Answer 1

Answer: (C)

54.4 eV

Answer 2

For the ionization of second He electron. $He^{+}$ will act as hydrogen like atom.

Hence ionization potential

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