Two isotopes of uranium are designed as \(^{238}U\) and \(^{235}U\). The numbers 238 and 235
PHYSICS
WAEC 2009
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: B. nucleon numbers
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)
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