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Atomic TheoryDL

7th Grade Atomic Theory Vocabulary

Vocabulary WordDefinition
Neutron No charge
Electron Negative Charge
Proton Positive charge
Element When something is only one kind of atom
Atom The basic unit of a chemical element
Malleable can be smashed without crumbling
Luster Shiny; reflects light
Ductile can be drawn into a thin wire
Corrosive rusts
Density Mass per volume
Noble Gas Unreactive Elements found in group 18
Transitional Metals Metallic element that has valence electrons In two shells instead of one
Halogens Most reactive nonmetal and has seven valence electrons
Alkali Metal Very reactive; only one valence electron
Alkaline Earth Metal Reactive; two valence electrons
Alloy a metal made by combining two or more metallic elements
Created by: ldoris