The Average Atomic Mass of Eu Is 151

question 124

Multiple Choice

The average atomic mass of Eu is 151.96 amu.There are only two naturally occurring isotopes of europium,¹⁵¹Eu with a mass of 151.0 amu and ¹⁵³Eu with a mass of 153.0 amu.The natural abundance of the ¹³¹Eu isotope must be approximately

• A)60%.
• B)20%.
• C)50%.
• D)80%.
• E)40%.

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Definitions:

Nonverbal Communication

The process of conveying a message without the use of words, which can include gestures, body language, facial expressions, and other visual cues.

Formal Schedule

An organized list of planned events or activities with designated times and dates, often official or requiring adherence to protocol.

Team Member

An individual who is part of a group working together towards a common goal or project.

Definite "No"

A clear and unequivocal negative response.