Answer :
Final answer:
The number 197 in Gold-197 represents the atomic mass of the gold isotope.
Explanation:
The number 197 in the name Gold-197 represents the atomic mass of the gold isotope. Atomic mass is the average mass of all the isotopes of an element, and it is usually written as a superscript before the element's symbol. In this case, Gold-197 refers to a specific isotope of gold with an atomic mass of 197 atomic mass units (amu).
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