1.

4 marks, 2 min.) 16, 08According to Bohr model, the ratio of area covered by second orbit of H atom nd first orbitof Hetontu estons (-1 negative marking) Q.16 to Q.191.(B) 16:164:1

Answer»

radius of the hydrogen atom is directly proportional to the square of its principle quantum number.

Area of circle (orbit) =π r²

Radius (r) of a shell =α n²/Z

Therefore, Area A = α π n4 (Z = 1 for both)

1st orbit:- n = 1, A = α π (1)⁴/Z = 1

2nd orbit:- n =2 ; A = α π (2)⁴/Z = 16

Therefore, ratio of second to first orbit is 16:1.

but the anwer is 64:1



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