Copper Has Two Naturally Occurring Isotopes with Atomic Masses of 62.9296

question 37

Multiple Choice

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u ( ) and 64.9278 u ( ) .The atomic mass of copper is 63.546 u.What is the percent distribution of the isotopes?

• A)69.15% ,30.85%
• B)30.85% ,69.15%
• C)1.08% ,98.92%
• D)98.92% ,1.08%
• E)99.03% ,0.97%

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Definitions:

Afterbirth

The placenta and other materials expelled from the uterus following the birth of a baby.

Conceive

To become pregnant or to form a new idea or plan in the mind.

Exposure

The condition of being subject to something which may have an impact, such as disease or elements, or gaining experience in a certain field.

Lead

A chemical element with the symbol Pb that is used in various industries but is toxic to humans and animals when ingested or inhaled.