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Classifing Elements
Vocabulary
Term | Definition |
---|---|
Proton | A particle in space inside the nucleus of an atom that carries one unit of positive electric charge |
Electron | A particle in the space outside the nucleus of an atom that carries one unit of negative electric charge |
Atomic Number | The number of protons in a single atom of an element |
Molecule | A particle that contains two or more atoms joined together |
Metal | A substance that conducts heat and electricity |
Nonmetal | A group of elements that are poor conductors of heat and electricity |
Noble Gases | The nonmetallic elements helium , neon , argon , krypton, xenon and radon . |
Metalloid | A small group of elements with some properties of both metals and nonmetals |
Periodic Table | A chart that shows all the known elements and their properties |