http://www.ck12.org Chapter 27. Glossary
allotrope
Multiple physical forms where one element can exist.alloy
A solid solution either of two or more metals, or of a metal or metals with one or more nonmetals.alpha helix
One basic form of secondary structure.alpha particle
This emission consists of a helium nucleus.amalgam
Special type of alloy used for a variety of purposes, including dentistry and gold extraction.amide bond
Links individual acids together.amide
Forms between a carboxylic acid and an amine.amine
Functional group consists of a C attached to a N. There can be three different classes of amines: primary,
secondary, and tertiary.amorphous solid
Solid that lacks an ordered internal structure.anion
Negatively charged ion.anode
The electrode at which oxidation occurs.Arrhenius acid
Produces a proton in solution.Arrhenius base
Produces a hydroxide ion in solution.atmospheric pressure
The force exerted by a hypothetical column of gas that stretches from sea level to the outer reaches of the
atmosphere.atom
Matter is composed of these tiny indivisible particles.atomic mass
The weighted average of the atomic masses of the naturally occurring isotopes of that element.