An Element Found in Another Galaxy Exists as Two Isotopes

question 100

Multiple Choice

An element found in another galaxy exists as two isotopes.If 80.0 percent of the atoms have an atomic mass of 80.00 atomic mass units and the other 20.0 percent have an atomic mass of 82.00 atomic mass units,what is the atomic mass of the element?

• A)81.0 atomic mass units
• B)64.0 atomic mass units
• C)80.4 atomic mass units
• D)16.4 atomic mass units
• E)81.6 atomic mass units

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Definitions:

Sales Returns and Allowances

Deductions from gross sales that reflect products returned by customers and discounts provided for minor defects.

Contra-asset Account

A type of account in the general ledger that reduces the value of a related account when its balance is subtracted from the balance of the related account.

Contra-revenue Account

An account that is offset against a revenue account on the income statement, typically relating to sales returns, allowances, and discounts.

Restructure Loan

The process of modifying the terms of a loan agreement, typically to provide relief to the borrower by reducing interest rates, extending payment periods, or forgiving part of the loan.