Answers

2015-10-10T09:57:55+05:30
Electron is excited to second orbit, n = 2
Helium, z = 2
a = 0.529 A

Radius of He ion = An^2/z = (0.529*2^2)/2 = 0.529*2 =1.058 A = 105.8 pm
 
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