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Chp.1.3-UnitD
the periodic table is a map of the elements
Question | Answer |
---|---|
reactive | likely to undergo a chemical change |
metal | an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat |
nonmetal | an element that is not a metal and has properties generally opposite to those of a metal |
metalloid | an element that has properties of both metals and nonmetals |
radioactivity | the process by which the nucleus of an atom of an element releases energy and particles |
half-life | the length of time it takes for half of the atoms in a sample of a radioactive element to decay into atoms of another element |