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Atomic Structure
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Subatomic particles, atomic models, nucleus
JEE Main level
Single correct option
Difficulty 2 of 3
as012
Nuclear radius follows
R
=
R
0
A
1/3
. The ratio of the radius of a nucleus of mass number 125 to that of mass number 8 is
A
15.6
B
3.95
C
2.5
D
5.0
Answer: C
R
125
/
R
8
=
(
125/8
)
1/3
= 5/2 = 2.5. The value 15.6 forgets the cube root.
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