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Chem 3
Molecules, Compounds and Chemical Equations
16
Chemistry
Undergraduate 1
10/03/2012

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Term
Ionic Bond
Definition
The chemical bond between a metal and a non-metal where an electron is transferred.
Term
Covalent Bond
Definition
The chemical bond between two atoms where an electron is shared.
Term
Empirical Formula
Definition
The smallest whole number ratio of elements.
Term
Molecular Formula
Definition
Actual ratio of elements, a multiple of the empirical formula.
Term
Atomic Elements
Definition
Elements that exist in nature with single atoms as their basic units.
Term
Molecular Elements
Definition
Elements that exist in nature as molecules. Eg. O2
Term
Diatomic Molecules
Definition
Molecular elements that come in two.
Term
Polyatomic Molecules
Definition
Molecular elements that exist in more than two.
Term
Hydrates
Definition
Ionic compounds that contain water molecules.
Term
Oxyacids
Definition
Molecules that contain a hydrogen and an axyanion.
Term
Formula mass
Definition
(Number of atoms in first elements x atomic mass of first elements) + (Number of atoms in second elements x atomic mass of first element) = etc...
Term
Molar mass
Definition
g/mol
Term
Mass percent composition
Definition
(Mass of element X in 1 mol of compound/Mass of 1 mol of the compound) x 100
Term
Chemical reaction
Definition
A process in which one or more substances are converted into one or more different ones.
Term
Combustion reaction
Definition
A chemical reaction in which a substance combines with oxygen to form one or more oxygen-containing compounds.
Term
What is emitted during a combustion reaction?
Definition
Heat
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