Question

what is the mass number of the uranium isotope with 140 neutrons? mass number =

Explanation:

Step1: Find the atomic number of uranium

The atomic number of uranium (\(U\)) is \(92\) (from the periodic table). The atomic number (\(Z\)) is equal to the number of protons.

Step2: Use the formula for mass number

The formula for mass number (\(A\)) is \(A = Z+N\), where \(Z\) is the number of protons and \(N\) is the number of neutrons. Given \(N = 140\) and \(Z=92\), we substitute into the formula: \(A=92 + 140\).

Step3: Calculate the mass number

\(A=92+140=232\)

Answer:

\(232\)