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The mass of one molecule of a nonionic substance in atomic mass units.

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Extrapolate

To estimate the value of a result outside the range of a series of known values. Technique used in standard additions calibration procedure.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

Bubbles

Have you ever noticed that soap bubbles go up in winter and fall down in summer? The reason is that warm air is lighter than cold. And in winter the difference between the air temperature in the room (especially near the windows) and the one you exhale into the bubble is enough to overcome the heaviness of its shell.

Band Theory of Metals

Theory that accounts for the bonding and properties of metallic solids.

Isomers

Different substances that have the same formula.

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Absorption Spectrum

Spectrum associated with absorption of electromagnetic radiation by atoms (or other species) resulting from transitions from lower to higher energy states. An absorption spectrum is the inverse of an emission spectrum.

Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Catenation

Bonding of atoms of the same element into chains or rings.
The bonding together of atoms of the same element to form chains.
The ability of an element to bond to itself.

Periodic Law

The properties of the elements are periodic functions of their atomic numbers.