The expression for bohr''s radius of an atom is, Chemistry

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The expression for Bohr's radius of an atom is:

(1) r= n2h2/ 4 Π 2me4z2                       

(2) r= n2h2/ 4 Π me2 z2         

(3) r=  n2h2/4 Π me3

(4) r= n2h2/ 4Π2 me2 z2

Ans: r= n2h2/ 4 Π me2 z2

 


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