Question

what is the atomic symbol of an isotope of bismuth with 125 neutrons? express your answer as an isotope. ²⁰⁸₈₃bi previous answers correct part e what is the name of an isotope with the same mass number as in part d, and 131 neutrons? spell out the name of the isotope.

Explanation:

Step1: Find mass number from part D

Mass number \( A = 208 \) (from \( ^{208}_{83}\text{Bi} \))

Step2: Calculate atomic number (Z)

\( Z = A - \text{neutrons} = 208 - 131 = 77 \)

Step3: Identify element with Z=77

Element 77 is Iridium

Answer:

iridium-208