A Certain Element Consists of Two Stable Isotopes

question 10

Multiple Choice

A certain element consists of two stable isotopes.The first has a mass of 14.0031 amu and a percent natural abundance of 99.63%.The second has a mass of 15.001 amu and a percent natural abundance of 0.37%.What is the atomic weight of the element?

• A) 13.95 u
• B) 14.00 u
• C) 14.01 u
• D) 14.50 u
• E) 19.50 u

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Definitions:

Lung Volume

The total amount of air that the lungs can hold, varying with age, size, fitness, and disease states.

Lung Elasticity

The ability of lung tissue to return to its original size and shape after being stretched or compressed, essential for normal breathing.

Expiratory Reserve Volume (ERV)

The additional amount of air that can be forcibly exhaled after a normal exhalation, reflecting the capacity for voluntary lung deflation beyond passive expiration.

Tidal Inspiration

The normal process of taking air into the lungs during breathing at rest without extra effort.