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:

Question

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 amu (B) 0.04050 amu (C) 0.04052 amu (D) 0.04055 amu

Tardigrade Admin · Accepted Answer

Mass defect = mass of nucleons - mass of nucleus =(3× 1.007277+4× 1.008665)-7.016005 =0.040486 text amu ≈ 0.04050 text amu

Q. $L i$ 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:

0.04048 amu

0.04050 amu

0.04052 amu

0.04055 amu

0.04058 amu

Mass defect = mass of nucleons - mass of nucleus
$= (3 \times 1.007277 + 4 \times 1.008665) - 7.016005$
$= 0.040486 am u$
$\approx 0.04050 am u$

Q. 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: