Question

Rhenium (Re) is made up of 37.4% R^185e and 62.6% R^187e. What is the number of protons in an atom of the least abundant isotope?

A. 75 protons
B. 76 protons
C. 77 protons
D. 78 protons

Answer 1

The number of protons in an atom of the least abundant isotope of Rhenium is 75 protons.

Step-by-step explanation:

Rhenium (Re) is made up of 37.4% R^185e and 62.6% R^187e. To determine the number of protons in the least abundant isotope of Rhenium, we need to find the atomic number of that isotope. The atomic number represents the number of protons in an atom. The atomic number for Rhenium is 75, which means it has 75 protons. Since the least abundant isotope in Rhenium is R^185e, the answer is A. 75 protons.