Question

what is the atomic symbol and mass number for an atom containing 92 protons and 143 neutrons? answer: a 143nd b 235pu c 235u d 238u e 92zr

Explanation:

Step1: Determine the atomic symbol

The element with 92 protons is Uranium, symbol \(U\).

Step2: Calculate the mass number

Mass number \(A=\) number of protons \(+\) number of neutrons. Given protons \(= 92\) and neutrons \(=143\), then \(A=92 + 143=235\).

Answer:

C. \(^{235}U\)