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Li nucleus has three protons and four ne...

Li nucleus has three protons and four neutrons. Mass of lithium nucleus is 7.016005 amu. Mass of proton is 1.007277 amu and mass of neutron is 1.008665 amu. Mass defect for lithium nucleus in amu is :

A

`0.04048 am u `

B

`0.04050 am u `

C

`0.04052 a m u `

D

`0.04055 amu`

Text Solution

Verified by Experts

The correct Answer is:
B
Mass defect=mass of nucleons-mass of nucleus
`= ( 3 xx 1. 00 7277+ 4 xx 1.008665 )- 7. 016005`
`= 0.040486 ` amu
`~~0.0450` amu
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