Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 12. atoms4 Marks
MCQ
The ionization potential for second He electron is......$eV$
A
$13.6$
B
$27.2 $
✓
$54.4$
D
$100$
✓
Answer
Correct option: C.
$54.4$
c (c) For the ionization of second $He$ electron. will act as hydrogen like atom.
Hence ionization potential
$={{Z}^{2}}\times 13.6\,volt={{(2)}^{2}}\times 13.6=54.4\,V$
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