A noncrystalline solid with no well-defined ordered structure.
Unit of electrical current; one ampere equals one coulomb per second.
Ability of a substance to exhibit amphiprotism by accepting donated protons.
The ability to react with both acids and bases.
Ability of substance to act as either an acid or a base.
A negative ion; an atom or goup of atoms that has gained one or more electrons.
In a cathode ray tube, the positive electrode.
Electrode at which oxidation occurs.
A molecular orbital higher in energy than any of the atomic orbitals from which it is derived; lends instability to a molecule or ion when populated with electrons; denoted with a star (*) superscript or symbol.
Benzene and its derivatives.
An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.
Group of atoms remaining after a hydrogen atom is removed from the aromatic system.
Short-lived species formed by the collision of dissolved ions of opposite charges.
A unit of pressure; the pressure that will support a column of mercury 760 mm high at 0 °C.
The smallest particle of an element
Atomic Mass Unit (amu)
One twelfth of a mass of an atom of the carbon-12 isotope; a unit used for stating atomic and formula weights; also called dalton.
Integral number of protons in the nucleus; defines the identity of element.
Region or volume in space in which the probability of finding electrons is highest.
Radius of an atom.
Weighted average of the masses of the constituent isotopes of an element; The relative masses of atoms of different elements.
Aufbau ('building up') Principle
Describes the order in which electrons fill orbitals in atoms.
An ionization reaction between identical molecules.
At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.
The number (6.022x10^23) of atoms, molecules or particles found in exactly 1 mole of substance.
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