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:

Cash Collections

The process of gathering and managing the cash payments received from customers or clients.

Sales Forecast

An estimate of the future sales of a product or service over a specific period, based on historical data, market analysis, and other factors.

Accounts Receivable

Money owed to a business by its customers for goods or services that have been delivered but not yet paid for.

Average Collection Period

The average number of days it takes for a company to collect payments from its credit sales, a measure of the effectiveness of its credit and collection policies.