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balance: n. Any piece of apparatus used to determine the mass of a sample of matter.v. as in balance an equation: to have equal numbers of atoms of each element on the opposite sides of an equation.
base: A compound that produces hydroxide ions in water solution.
battery: An electrochemical cell that can be used as a source of direct current at a constant voltage.
binge drinking: The consumption of five or more drinks in a row on at least one occasion.
biochemistry: The science that makes use of chemistry to learn about and explain biologically important systems.
biomethylation: Becoming methylated through biological action; for example, bacteria can generate methylated mercury in aquatic sediments.
blood alcohol level
blood alcohol content: The amount of alcohol in a person's bloodstream measured in percentages. Abbreviated BAL or BAC.
bond: A force which holds together two atoms, two ions, two molecules, or a combination of these.
brine: Water saturated with salt; a strongly saline solution.
Bunsen burner: Common laboratory burner that uses natural gas or propane, developed by German chemist Robert Wilhelm Bunsen during the 19th century.