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At constant pressure the volume occupied by a definite mass of gas is directly proportional to its absolute temperature.

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Law of Combining Volumes (Gay-Lussac's Law)

At constant temperature and pressure, the volumes of reacting gases (and any gaseous products) can be expressed as ratios of small whole numbers.

 

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Spectator Ions

Ions in a solution that do not participate in a chemical reaction.

Ground State

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

Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Vapor

A gas formed by boiling or evaporating a liquid.

Mother Nuclide

Nuclide that undergoes nuclear decay.