Energy = - 13.6z×z/n× n electron volt= -54.4 electron volt (in this case z = 2 and n= 2). radius of first orbit of he=0.265angstrom and vanderwall radius of he element= 140 picometer
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Energy = - 13.6z×z/n× n electron volt= -54.4 electron volt (in this case z = 2 and n= 2). radius of first orbit of he=0.265angstrom and vanderwall radius of he element= 140 picometer