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chap17 vocab-bibbs

phys sci 17 atoms and periodic table

TermDefinition
atom smallest piece of matter that still retains the property of the element
atomic number Number of protons in an atom
average atomic mass weighted-average mass of the mixture of its isotopes
electron particles with a 1- charge
electron cloud 1926 model of electrons moving so fast around a nucleus that they blur
electron dot diagram symbol of the element and dots to represent the electrons in the outer energy level
group vertical columns in the periodic table and are number 1-18 with similar properties
isotope atoms of the same element that have different numbers of neutrons
mass number sum of the number of protons and the number of neutrons in the nucleus of an atom
neutron particles with no charge
nucleus positively charged center of an atom
period horizontal rows of elements on the periodic table
periodic table elements arranged by increasing atomic number and by changes in physical and chemical properties
proton particles with a 1+ charge
quark Smallest particles that exist making up protons and neutrons
Created by: Patti_lover20
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