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Chapter 5 Vocabulary: Chemical Names and Formulas

anion any atom or group of atoms with negative charge
binary compound compound composed of two elements
cation any atom or group of atoms with positive charge
chemical formula a short hand method used to show the number and type of atoms present in the smallest representative unit of substances
formula unit the lowest whole number ratio of ions in an ionic compound
group a vertical column of elements in the periodic table
ion an atom or group of atoms that has a positive or negative charge
ionic compound a compound composed of positive and negative ions
law of definite proportions in any chemical compound the elements are always combined in the same proportions by mass
law of multiple proportions whenever two elements form more than one compound the different masses of one element that combine with the same mass of the other element are in the ratio of small numbers
metal one of a class of elements that includes the large majority of the known elements
metalloid one of the class of elements having the properties of both metals and non-metals
molecule a neutral chemically bonded group of atoms that act as a unit
molecular compound a compound that is composed of molecules
molecular formula a chemical formula that shows the actual number and kinds of atoms present in a molecule of a compound`
non-metal one of the class of elements that are not lustrious and are generally poor conductives of heat and electricity
periodic table an arrangement of elements in two rows and columns according to similaritie in their properties
polyatomic ion a tightly bound group of atoms that behaves as the unit and carries a charge
representive element an element that belongs to an A group on the periodic table
terinary compound a compound containing atoms of three different elements with one or more polyatomic ions usually present
transition metal an element found in one of the B groups on the periodic table
Created by: KellyBeck