Question

The difference between $U^{235}$ and $U^{238}$ atom is that

• A. $U^{238}$ contains $3$ more protons
• B. $U^{238}$ contains $3$ protons and $3$ more electrons
• C. $U^{238}$ contains $3$ more neutrons and $3$ more electrons
• D. $U^{238}$ contains $3$ more neutrons

Answer 1

Answer: (D)

As charge number is fixed $\left(\right.92\left.\right)$ , therefore, number of protons and electrons is the same. As atomic weight is greater by $3$ , therefore ${ }_{92} U^{238}$ contains $3$ more neutrons.