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Subatomic particles, atomic models, nucleus
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Single correct option
Difficulty 1 of 3
as002
The number of neutrons in the nucleus of
X
92
235
X
2
92
2
235
U
is
A
92
B
143
C
235
D
327
Answer: B
Neutrons = mass number - atomic number = 235 - 92 = 143.
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