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Byju's Answer
Standard XII
Physics
Law of Radioactivity
What is the m...
Question
What is the mass of one Curie of
U
234
A
3.7
×
10
10
g
m
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B
2.348
×
10
23
g
m
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C
1.44
×
10
−
11
g
m
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D
6.25
×
10
−
34
g
m
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Solution
The correct option is
C
1.44
×
10
−
11
g
m
1 curie =
3.71
×
10
10
disintegration/sec and mass of
6.02
×
10
23
atoms of
U
234
=
234
g
m
∴
Mass of
3.71
×
10
10
atoms
=
234
×
3.71
×
10
10
6.02
×
10
23
=
1.44
×
10
−
11
g
m
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13
Similar questions
Q.
What is the mass of one curie of
U
234
?
Q.
The mass of
U
234
, with half-life
2.5
×
10
5
, corresponding to its activity of
1
Curie will be
Q.
The curie was originally intended to be the activity of one gram of radium-226. The actual weight of radium which is equal to one curie is (in gm)
T
50
(Radius-226) = 1620 years
One curie =
3.7
×
10
10
disintegrations (of atoms) per second (dps)
One year =
3.154
×
10
7
seconds
Q.
Show that the mass of radium
(
88
R
a
226
)
with an activity of
1
curie is almost
1
gram
[
T
1
2
=
1600
years].
[
1
curie
=
3.7
×
10
10
disintegrations per second].
Q.
The activity of a radioactive nuclide (X
100
) is
6.023
curie. If its disintegration constant is
3.7
x
10
4
sec
−
1
, then the mass of X is
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