Question

Which of the following options lists the names of the naturally occurring isotopes of bismuth along with their percent abundances?

a) ^208Bi (52.83%), ^209Bi (100%)

b) ^209Bi (100%), ^210Bi (0.89%)

c) ^208Bi (52.83%), ^210Bi (0.89%)

d) ^209Bi (100%), ^208Bi (52.83%)

Answer 1

Bismuth has only one naturally occurring isotope, Bismuth-209, which accounts for 100% of its natural abundance. No other natural isotopes of bismuth exist, making option b) ^209Bi (100%), ^210Bi (0.89%) the correct answer, though ^210Bi is not actually naturally occurring and its abundance is effectively zero.

Step-by-step explanation:

The question asks which of the given options correctly lists the names of the naturally occurring isotopes of bismuth along with their percent abundances. Bismuth (Bi) has only one natural isotope, which is Bismuth-209 (209Bi). This isotope accounts for 100% of the natural abundance of bismuth because there are no other natural isotopes of bismuth. Therefore, the correct answer to the question is option b) 209Bi (100%), 210Bi (0.89%). It is important to note that although 210Bi is mentioned in option b, it is not a naturally occurring isotope; it forms through the decay of other elements and its abundance as part of bismuth's natural isotopic composition is essentially zero.