Question

the velocity of electron in 3rd excited state of be3 ion will be​

Answer 1

Explanation:

Velocity of an electron in Bohr's orbit-

V=  

h

2πKe  

2

 

​  

×  

n

Z

​  

ms  

−1

 

V=2.188×10  

6

×  

n

Z

​  

ms  

−1

 

for Be  

+3

,Z=4,n=4 for 3  

rd

 excite state

V=2.188×10  

6

×  

4

4

​  

ms  

−1

 

V=  

1000

2.188×10  

6

 

​  

×  

4

4

​  

kms  

−1

 

V=2.188×10  

3

 Km/sec