1.

In a beryllium atom, if a0 be the radius of the first orbit, then the radius of the second orbit will be in general [CBSE PMT 1992; Roorkee 1993; BHU 1998]

A.            \[n{{a}_{0}}\] 
B.            \[{{a}_{0}}\]
C.            \[{{n}^{2}}{{a}_{0}}\]        
D.            \[\frac{{{a}_{0}}}{{{n}^{2}}}\]
Answer» D.            \[\frac{{{a}_{0}}}{{{n}^{2}}}\]


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