Two isotopes of uranium are designed as 238 U a... - WAEC Physics 2009 Question
Two isotopes of uranium are designed as (^{238}U) and (^{235}U). The numbers 238 and 235 represent their
A
atomic numbers
B
nucleon numbers
C
proton numbers
D
neutron numbers
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Correct Option: B
neutrons + protons = the nucleus or mass numbers.
U-238 has mass number(proton 92 + neutron 146=238)
U-235 has mass number (proton 92 + neutron 143 =235)
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