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A helium nucleus.

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Curie (Ci)

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals 37 billion disintegrations per second or approximately the amount of radioactivty given off by 1 gram of radium.

Turning iron nail into copper nail

This simple chemical experiment shows the so-called process of copper plating of metal products. Copper has the ability to deposit on a metal surface.

Dynamic Equilibrium

An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Reaction Quotient

The mass action expression under any set of conditions (not necessarily equlibrium), its magnitude relative to K determines the direction in which the reaction must occur to establish equilibrium.

Saturated Hydrocarbons

Hydrocarbons that contain only single bonds. They are also called alkanes or paraffin hydrocarbons.

Allotropes

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

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Ligand

A Lewis base in a coordination compound.

Carbanion

An organic ion carrying a negative charge on a carbon atom.