Homework Answers
The isotopic mass for a particular isotope of gold is 196.9665 amu. The mass number for this gold isotope is:
Ans: is 197
Atomic number of gold is 79.
Number of protons = 79
Mass of protons = 79 x 1.00728 = 79.57512 amu
Mass of neutrons = 118 x 1.008664 = 119.022352 amu
Total mass = 198.597472 amu
The difference in energy is due to mass defect.
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