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Q.

The formula for angular momentum is written as mvr = nh/2π. What is n? 

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a

Azimuthal quantum number 

b

Spin quantum number 

c

The velocity of the electron in its orbit 

d

Principal quantum number 

answer is C.

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Detailed Solution

In mvr = nh/2π 

n is an integer (n = 1,2,3,4,…….) and is called a principal quantum number.  

m = mass of the electron  

v = velocity of an electron in its orbit  

r = distance of the electron from the nucleus 

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The formula for angular momentum is written as mvr = nh/2π. What is n?