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Compounds/Gram Formula/Percent Composition
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16
Chemistry
11th Grade
05/07/2009

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Term
Heterogeneous
Definition
Materials composed of two or more phases wich are separated by definite boundaries called interfaces.
Term
Mixture
Definition
Any material composed of two or more kinds of matter, each keeping its own characteristic properties, can be mixed in varying proportions and can be separated by mechanical means.
Term
Homogeneous
Definition
Those materials which are uniform in composition, each part has identical properties, and consists of a single phase.
Term
Element
Definition
Substances composed of only one kind of atom and cannot be further deocomposed by ordinary chemical means.
Term
Atom
Definition
The smallest unit of an element that can enter into combination with other elements.
Term
Molecule
Definition
The smallest part of a compound with all the properties of the compound.
Term
Ion
Definition
an atom or group of atoms which possesses an overall electrical charge by gaining or losing electrons.
Term
Polyatomic Ion (Radical)
Definition
When two or more atoms are chemically bonded and possesses an electrical charge.
Term
Acid
Definition
Compounds with have hydrogen as the only positive part of the compound.
Term
Base
Definition
Compounds which have Hydroxide as their only negative part.
Term
Oxide
Definition
Compounds which have oxygen as their only negative part.
Term
Salts
Definition
All compounds which are not acids, bases, or oxides.
Term
Gram Formula Mass
Definition
The sum of the gram atomic masses of the moles of the atoms in one mold of formula units of a substance.
Term
Percent Composition=
Definition
total mass of element (or H2O)/ gfm *100%
Term
Hydrate
Definition
A crystal which contains water of hydration.
Term
Anhydrous Salt
Definition
The salt that is left when the water is evaporated from the hydrate.
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