Zinc Has Five Naturally Occurring Isotopes with an Average Mass

question 73

Multiple Choice

Zinc has five naturally occurring isotopes with an average mass of 65.39 amu. Three isotopes, in roughly equal amounts, account for 95% of zinc. Which isotope is most abundant?

• A)(⁶⁴Zn, 63.9291 amu)
• B)(⁶⁶Zn, 65.9260 amu)
• C)(⁶⁷Zn, 66.9271 amu)
• D)(⁶⁸Zn, 67.9249 amu)
• E)(⁷⁰Zn, 69.9253 amu)

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Definitions:

Carolingian Empire

A large Frankish-dominated empire in Western and Central Europe during the early medieval period, founded by Charlemagne in 800 AD.

Ottonians

Pertaining to the dynasty that ruled the Germanic Holy Roman Empire from the 10th to the early 11th century, known for its contributions to pre-Romanesque art and architecture.

Hiberno-Saxon

An art style that flourished in the monasteries of the British Isles in the early Middle Ages. Also called Insular.

Medieval Monasteries

Religious communities or buildings where monks or nuns live, work, and pray, prevalent during the medieval period across Europe.