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Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

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Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Chemical Change

A change in which one or more new substances are formed.

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Galvanizing

Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.

 

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.

Why do copper products change color, and what is the name of the process?

Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Percent Purity

The percent of a specified compound or element in an impure sample.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Acetic Acid

CA3COOH, clear, colorless liquid, pungent odor. Boiling point 140C, flash point 54C (closed cup), autoignition temperature 38OC.