Compounds, Formulae and Equations

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5 Terms

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Compound

A substance that is composed of atoms of two or more elements chemically bonded

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Molecule

The smallest part of a covalent compound that can exist while reattaining the chemical identity, consisting of two or more atoms covalently bonded

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monoatomic ion

Formed by the gain or loss of electron to the outer-most electron shell in a single atom

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Polyatomic ions

An ion made up of two or more atoms from different elements that are chemically bonded together.

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Common polyatomic ions

1+

1-

2-

3-

Ammonium

NH4+

Hydroxide

OH-

Carbonate

CO32-

Phosphate

PO43-

Nitrate

NO3-

Sulfate

SO42-

Nitrite

NO2-

Sulfite

SO32-

Hydrogen carbonate

HCO3-

Dichromate (VI)

Cr2O72-

Manganate (VII)

MnO4-