GOB Chemistry
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The mass numbers of the two naturally occurring isotopes of antimony are 121 and 123. The atomic mass of antimony on the periodic table is 121.76. Explain why this atomic mass is not a whole number.
18073Ta and 18173Ta are the two isotopes of tantalum. Which isotope is more abundant, 18073Ta or 18173Ta, if the atomic mass of tantalum on the periodic table is 180.95?
Chromium has four naturally occurring isotopes: Cr–50 (49.95 amu), Cr–52 (51.94 amu), Cr–53 (52.94 amu), and Cr–53.94 amu). Identify the most abundant isotope.
Silicon has three stable isotopes. The most common form is 28Si at 92.2% natural abundance with a mass of 27.9769 amu, 29Si has a 4.7% natural abundance, while 30Si has a natural abundance of 3.1% and a mass of 29.9738 amu. Calculate the mass of the 29Si isotope.
Fill in the missing isotopic data of Antimony (Sb) in the following table.