1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
Reasons of Stability
Helium has a ...
Question
Helium has a mass number
4
and the atomic number
2
. Calculate the nuclear binding energy per nucleon. (mass of neutron
=
1.00893
a
m
u
and proton
=
1.00814
a
m
u
,
H
e
=
4.0039
a
m
u
and mass of electron is negligible).
Open in App
Solution
B
.
E
=
931.5
M
e
v
×
(
△
m
)
△
m
=
(
4.0039
−
2
×
1.0081
−
2
×
1.00893
)
=
−
0.03016
B
E
=
−
0.03016
×
931.5
=
−
28.094
BE/nucleon
=
−
28.094
4
=
−
1.038
M
e
v
Suggest Corrections
0
Similar questions
Q.
Calculate the mass defect and binding energy per nucleon of
16
8
O
which has a mass
15.99491
a
m
u
.
Mass of neutron
=
1.008655
a
m
u
Mass of proton
=
1.007277
a
m
u
Mass of electron
=
0.0005486
a
m
u
1
a
m
u
=
931.5
M
e
V
Q.
Assertion :Nuclear binding energy per nucleon is in the order
9
4
B
e
>
7
3
L
i
>
4
2
H
e
. Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
Q.
The atomic mass of
8
O
16
is
15.9949
a
m
u
. Mass of one neutron and one proton is
2.016490
a
m
u
and the mass of an electron is
0.00055
a
m
u
. The binding energy per nucleon of oxygen atom is
Q.
Nuclear binding energy is the energy released during the hypothetical formation of the nucleus by the condensation of individual nucleons. Thus, binding energy per nucleon =
Total binding energy
Number of nucleons
For example, the mass of hydrogen atom is equal to the sum of the masses of a proton and an electron. For other atoms, the atomic mass is less than the sum of the masses of protons, neutrons and electrons present. This difference in mass, termed as mass defect, is a measure of the binding energy of protons and neutrons in the nucleus. The mass-energy relationship postulated by Einstein is expressed as:
Δ
E
=
Δ
m
c
2
Where
Δ
E
is the energy liberated,
Δ
m
is the loss of mass, and c is the speed of light.
M
P
and
M
n
are masses of a proton and a neutron respectively. For a nucleus, its binding energy is
B
and it contains
Z
protons and
N
neutrons, the correct relation for this nucleus if
C
is velocity of light is:
Q.
Calculate the binding energy per nucleon for Beryllium
4
B
e
9
, its mass being
9.012
u
. The masses of proton and neutron are
1.008
u
and
1.009
u
. (Take
1
u
=
931.5
M
e
V
)
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Electronic Configuration and Orbital Diagrams
CHEMISTRY
Watch in App
Explore more
Reasons of Stability
Standard XII Chemistry
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
AI Tutor
Textbooks
Question Papers
Install app