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Grade 9Modern Physics

the ionization energy of H atom is 13.6 eV . what will be the ionization energy of He ^+ and li^2+

Profile image of aastha
8 Years agoGrade 9
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2 Answers

Profile image of Arun
8 Years ago
Dear Aastha
 
Please ask one question in one thread
 
For He+

I.E. = 13.6Z2/n2 

=  13.6 x Z2 \12 [Z =2 for He+]

= 13.6 x 4 = 54.4 eV
 
Regards
Arun (askIITians forum expert)
Profile image of Arun
8 Years ago
Dear Aastha
 

for Li2+ = 13.6 x 32/12

= 13.6 x 9 = 122.4 eV
 
Regards
Arun (askIITians forum expert)
 
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