Question

Find the energy equivalent of one atomic mass unit, first in Joules and then in MeV. Using this, express the mass defect of ¹⁸8O in MeV/c². (answer for this FRIENDS please)​

Answer 1

Answer:

1amu=1.66×10  

27

kg

C= speed of light =3×10  

8

m/s

E=mC  

2

 

=1.66×10  

27

(3×10  

8

)  

2

=1.49×10  

−10

 Joule

1meV=1.6×10  

−13

J

E=  

1.6×10  

−13

 

1.49×10  

−10

 

​  

=931.6MeV

O  

8

16

​  

= mass no. =16

energy for 16amu=16×931.6=14905.6MeV

Mass defect=  

C  

2

 

energy

​  

=  

C  

2

 

14905.6MeV

​