Question

A particular isotope of uranium has a nucleus with 92 protons and 143 neutrons identify this isotope in two diffrent ways

Answer 1

Isotopes can represented in two ways. In the first way, the element's symbol is used with mass number at the upper left and atomic number written on the lower left of the symbol. In the other form of representation, the isotope name is written with a dash and mass number.

Given that the isotope has 92 protons. So the atomic number is 92.

The isotope has 143 neutrons

So the mass number = Total number of protons + Neutrons

                                  = 92 + 143 = 235

Therefore, the two ways of representing the isotope is:

1. $^{235}_{92} U$

2. Uranium-235