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Classifying Elements
vocabulary
Question | Answer |
---|---|
atomic number | the number of protons in a single atom of an element |
molecule | a particular that contains two or more atoms joined together |
metals | a substance that conducts heat and electricity |
nonmetals | 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 of the known elements and their elements |