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Ions resulting from the formation of coordinate covalent bonds between simple ions and other ions or molecules.

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Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Copper

Discovered : known to ancient civilisations
Origin : The name is derived from 'Cuprum', the Latin name for Cyprus.

Native State

Refers to the occurrence of an element in an uncombined or free state in nature.

 

Degenerate

Of the same energy.

Lanthanides

Elements 58 to 71 (after lanthanum).

Dimer

Molecule formed by combination of two smaller (identical) molecules.

Positron

A Nuclear particle with the mass of an electron but opposite charge.

Deposition

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

Foam

Colloidal suspension of a gas in a liquid.

Insulator

Poor electric and heat conductor.