A) 38.2
B) 49.2
C) 51.8
D) 79.0
Correct Answer: D
Solution :
[d] For helium ion, Z=2 and for first orbit n=1 \[\therefore E{{ & }_{1}}=\frac{-13.6}{{{\left( 1 \right)}^{2}}}\times {{2}^{2}}=-54.4eV\] \[\therefore \]Energy required to remove this \[{{e}^{-}}=+54.4eV\] \[\therefore \]Total energy required\[=54.4+24.6=79eV\]You need to login to perform this action.
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