The Finding That Electrons Occupy Discrete Orbits in an Atom

question 6

Multiple Choice

The finding that electrons occupy discrete orbits in an atom was first explained by the

• A)quantization of electric charge.
• B)small mass of the electron.
• C)circumference of each orbit being an integral multiple of an electron wavelength.
• D)none of the above

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Definitions:

Hydrophilic

A term describing molecules or substances that have an affinity for water, making them capable of dissolving in or being wetted by water.

Fatty Acid

A lipid that is an organic acid containing a long hydrocarbon chain, with no double bonds (saturated fatty acid), one double bond (monounsaturated fatty acid), or two or more double bonds (polyunsaturated fatty acid); components of triacylglycerols and phospholipids, as well as monoacylglycerols and diacylglycerols.

Ligand

A molecule that binds to a specific site in a receptor or other protein.

Receptor

(1) In cell biology, a molecule on the surface of a