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Q.

The radius of the 2nd orbit of Li2+  is  . The expected radius of the 3rd orbit of Be3+ is 

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a

94x

b

49x

c

2716x

d

1627x

answer is D.

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Detailed Solution

detailed_solution_thumbnail

rn=0.529n2zrLi+2rBe+3=nLi+22nBe+32⋅zBe+3zLe+2xrBe+3=49×43rBe+3=2716x
Option 4 is correct

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