Acid ionization constant
The equilibrium constant describing the degree of dissociation
of an acid.
Actinides
The row of elements below the periodic table, from thorium
to lawrencium.
Alkali
Synonym for base.
Alkali metals
The column of elements from lithium to francium.
Alkaline earths
The column of elements from beryllium to radium.
Alkane
A hydrocarbon without a double bond, triple bond or ring
structure.
Alkene
A hydrocarbon with one or more double bonds and no triple
bond.
Alkyne
A hydrocarbon with one or more triple bonds.
Alpha particle
A cluster of 2 protons and 2 neutrons emitted from a
nucleus in one type of radioactivity.
Anion
An atom or molecule with a negative charge.
Anode
The negative electrode at which oxidation occurs.
Aqueous
Refers to a solution with water as solvent.
Aromatic
Refers to an organic compound with a benzene-like ring.
Atom
The smallest amount of an element; a nucleus surrounded
by electrons.
Atomic number
The number of protons in the nucleus of the chemical
element.
Atomic weight
The weight in grams of one mole of the chemical element;
approximately the number of protons and neutrons in the nucleus.
Avogadro's Law
Equal volumes of gases contain the same number of molecules.
Avogadro's Number
6.02 x 1023 , the number
of molecules in 1 mole of a substance.