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Recongnize that there are more than 100 elements& some have similar properties

periodic table a chart that organizes all the information about all the elements known according to their properties
period in chemistry, a horizontal row of elements in the periodic table
group a vertical column of elements in the periodic table; elements in a group share chemical properties
valence electrons an electron that is found in the outermost shell of an atom and that determines the chemical properties
reactivity describes how likely an element is to form bonds with another elements
metalloid elements that have properties of both metals and nonmetals
inert unable to chemically react under normal circumstances
Created by: 65shawas