Boron Has Primarily Two Isotopes, One with an Atomic Mass

question 62

Multiple Choice

Boron has primarily two isotopes, one with an atomic mass of 11.0 amu and another with an atomic mass of 10.0 amu. If the abundance of the boron atom with a mass of 11.0 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent, what would be the average mass of the boron atom?

• A)10.2 amu
• B)11.0 amu
• C)10.0 amu
• D)10.8 amu
• E)not enough information given

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Definitions:

Demand Curve

A visual chart that illustrates the connection between a product's price and the amount consumers want to purchase.

Price

The monetary value needed to obtain a product, service, or investment.

Quantity Supplied

The amount of a good or service that producers are willing to sell at a given price over a specific period.

Substitute Goods

Goods or services that serve as alternatives to each other, where a rise in the cost of one results in a higher demand for the other.