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Classsifying Element
Vocabulary
Term | Definition |
---|---|
Proton | A particle in the space inside the nucleus of an atom, which carries one unit of a positive electric charge. |
Electron | A particle in space outside the nucleus of an atom that carries one unit of negative electric charge. |
Atomic number | The number of protons in an atom. |
Molecule | A particle that contains more one atom joined together. |
Nonmetal | An element that is a poor conductor of heat and electricity. |
Noble gasses | The nonmentallic elements helium, neon, argon, krypton, xenon, and radon. |
Metalloids | A very small group of elements that have some properties of the metals and some nonmetals. |
Periodic table | An arrangement of all the known elements in a chart of rows and columns of increasing atomic numbers. |
Metal | A substance that conducts heat and electricity well. |