Water

question 21

Multiple Choice

Water

• A)is a polar molecule.
• B)is referred to as a universal solvent.
• C)makes up over 70% (by wt.)of an organism.
• D)is often a product or reactant in chemical reactions.
• E)All of the choices are correct.

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Definitions:

Curie

A unit of radioactivity, representing the activity of one gram of radium; symbol Ci.

Radiotracer

A radioactive substance used in medical imaging to diagnose and track the function of organs or to detect disease.

Isotope

A variant of a particular chemical element that has the same number of protons but a different number of neutrons in its nucleus, leading to variations in atomic mass.

Dosimeter

A device used to measure exposure to ionizing radiation.