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Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.

All actinides are radioactive, highly electropositive, tarnish readily in air, react with boiling water or dilute acid to release hydrogen gas and combine directly with most nonmetals.

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Salicylate

A salt or ester of salicylic acid.

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Mixture

A sample of matter composed of two or more substances, each of which retains its identity and properties.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Alkyl Group

A group of atoms derived from an alkane by the removal of one hydrogen atom.

Supercooled Liquids

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

Sulfuric Acid

H2SO4: colorless, oily liquid, boiling point 330C. A 96 percent solution is used in the laboratory.

Fire Hazard: This is a very powerful, acidic oxidizer which can Ignite or even explode on contact with many materials, i.e. acetic acid ,acetone+ HNOs, alcohols, + H202, NH4OH, HCL, NaOH, and others.

Sulfuric acid has a wide range of uses and plays a part in the production of nearly all manufactured goods.

Periodic Table of Elements

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.