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Lanthanides

Elements 58 to 71 (after lanthanum).

Ground State

The lowest energy state or most stable state of an atom, molecule or ion.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Alkaline Earth Metals

Group IIA metals

Binary Acid

A binary compound in which H is bonded to one or more of the more electronegative nonmetals.

Buret

A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.

Active Metal

Metal with low ionization energy that loses electrons readily to form cations.

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Solvation

The process by which solvent molecules surround and interact with solute ions or molecules.

Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

Supercooled Liquids

Liquids that, when cooled, apparently solidify but actually continue to flow very slowly under the influence of gravity e.g glass.

Percent by Mass

100% times the actual yield divided by theoretical yield.

Oxide

A binary compound of oxygen.

Thermonuclear Energy

The energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. In these processes a small amount of mass is converted to energy according to the relationship E = mc2, where E is energy, m is mass, and c is the speed of light.

Atomic Weight

Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.

Lewis Acid

Any species that can accept a share in an electron pair.

D-Orbitals

Beginning in the third energy level, aset of five degenerate orbitals per energy level, higher in energy than s and p orbitals of the same energy level.

 

Allotropes

Different forms of the same element in the same physical state.