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
Correct Answer: Option B
Explanation
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)