Answer :
There are 66 neutrons in a single atom of indium-115. The atomic number of indium-115 is 49, meaning there are 49 protons. Then the atomic mass is 115, so 115-49 = 66.
Final answer:
In an atom of indium-115, there are 66 neutrons. This is calculated by subtracting the atomic number of indium, which is 49, from the mass number of the isotope, 115.
Explanation:
To determine the number of neutrons in an atom of indium-115, we first need to know the atomic number of indium, which is 49. This means that there are 49 protons in an indium atom. The mass number of an isotope represents the total number of protons and neutrons in the nucleus. In the case of indium-115, the mass number is 115. Knowing these two facts, we can calculate the number of neutrons by subtracting the atomic number from the mass number.
The calculation is 115 (mass number) - 49 (number of protons) = 66 neutrons. Therefore, there are 66 neutrons in a single atom of indium-115.
