click below
click below
Normal Size Small Size show me how
Classifying Elements
Vocabulary
Term | Definition |
---|---|
Proton | A particle In the 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. |
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 nonmetal. |
Periodic Table | A chart that shows all of the known elements and properties. |