Chapter 4: Classifying Elements

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noble gasone of a group of elements made up of gases that do not combine with other materials under ordinary circumstancesinertinactive; lacking power to moveEach element has asymbolAll elements are in order on the periodic table by...atomic numbersisotopes of the same element have the same number ofprotons and electronsElements are classified as...metals, nonmetals, or noble gasesMost metals are ______ at room temperaturesolidThe shape of a metal can bechangedelectricity and heat travel well throughmetalsmost nonmetals aresolids or gases at room temperaturenonmetals have opposite properties ofmetalsnoble gases are called _________________ because they do not ordinarily react or combine with other elements.inert