What is the total number of protons and neutrons in the nucleus of an atom of the fissionable isotope of uranium used in nuclear weapons,²³⁵U,which has an atomic number of 92?
A) 235
B) 92
C) 143
D) 327

Question

Quizplus · Accepted Answer

The total number of protons and neutrons in the nucleus of an atom is called the mass number. For uranium-235 (²³⁵U), the mass number is 235, which is the sum of its 92 protons and 143 neutrons.

What Is the Total Number of Protons and Neutrons in the Nucleus