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Classifying Elements
Vocab
Term | Definition |
---|---|
Proton | A particle in the space inside the nucleus of an atom that carries one unit of positive electric charge. |
Neutron | NO DEFINITION |
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. |
Metals | 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. |
Metalloids | A small group of elements with some properties of both metals and nonmetals. |
Periodic table | A chart that shows all of the known elements and their properties. |