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unit 3

QuestionAnswer
atom the smallest particle into which an element can be divided and still be the same element
nucleus a small, dense center that has a positive charge and is surrounded by moving electrons
protons positively charged particles in the neclues
neutron contains an uncharged particles
electron cloud electrons move within an area around the neucles
mass number the total number of protons and neutrons in an atoms neucles
atomic number the number of protons in the neucles of an atom
periodic table arrangement of elements
metals elements that are shiny and conduct heat and electricity
nonmetals poor conductors of heat and electriciyt
metaloids elements that have some properties of metals and some properties of nonmetals
group vertical column of elements on an periodic table
period each horizontal row of the periodic table
chemical symbol abbreviation for the elements name
average atomic mass an atom is the weighted average of the masses of all the naturally occurring isotopes of stas
electron negatively charged particles
Created by: 18cheern0930
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