Antimony Has Two Naturally Occurring Isotopes with Masses Given in the Table

question 8

Multiple Choice

Antimony has two naturally occurring isotopes with masses given in the table below. The relative atomic mass given for antimony on the periodic table is 121.75.

Which of the following is true?

• A) When a sample of antimony is placed in a mass spectrometer, one peak will be observed at the average relative atomic mass.
• B) Two peaks will be observed and the ¹²¹Sb will be larger.
• C) Two peaks will be observed and the ¹²³Sb will be larger.
• D) Three peaks will be observed at 120.9038, 121.75, and 122.90911.
• E) Not enough information is given to answer the problem.

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Definitions:

High-Unit Cost

The condition of having a high cost per unit of product, often due to expensive inputs or inefficient production.

FIFO

First-In, First-Out, an inventory valuation method where goods purchased or manufactured first are sold or used first.

LIFO

Last In, First Out, an inventory valuation method where the most recently produced items are recorded as sold first.

Bonus Rate

An additional rate of interest applied over the standard rate in certain savings accounts or investments as an incentive.