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Chemical Bond

the attractive force that holds atoms or ions together

Chemical Structure

The arrangement of atoms in a substance

Bond length

The average distance between the nuclei of two bonded atoms

Bond angle

The angle formed by two bonds to the same atom

Ionic Bond

The attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another

Covalent bond

A bond formed when atoms share one or more pairs of electron

Metallic Bond

a bond formed by the attraction between positively charged metal ions and the electrons around them

Polyatomic Ion

an ion made of two or more atoms

Empirical Formula

the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio

Molecular Formula

A chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement of atoms

Organic Compound

A covalently bonded compound that contains carbon, excluding carbonates and oxides


A large molecule that is formed by more than five monomers, or small units


A class of molecules that includes sugars, starches, and fiber. Contains carbon, hydrogen, and oxygen.


An organic compound that is made of one or more chains of amino acids that is a principal component of all cells

Amino Acid

A compound of a class of simple organic compounds that contain a carboxl group and an amino group and that combine to form proteins


NH4 +1


OH -1


NO3 -1


C2H302 -1


CN -1


ClO3 -1


SO4 -2


CO3 -2


PO4 -3

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