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chapt 17

physical science

TermDefinition
atom The smallest piece of matter that still retains the property of the element.
atomic number the numbers of protons in an atom is equal to a number
average atomic mass the weighted average mass of the isotopes
electron Particles with an electrical charge of 1-
electron cloud is the area around the nucleus of an atom
electron dot diagram uses the symbol of elements and dots to representthe electrons in the outer energy
group the verticals columns in the periodic tables
isotope atoms of the same element that have diffent numbers of neutrons
mass number sum of the number of protons and the number of neutrons in the nucleus of protons
neutron Neutral particles that do not have an electrical charge
nucleus protons and neutrons are found in a small positively charged center of the atom
period the horizontal rows of elements of the periodic tabe
periodic table elements arranged by increasing atomic number and by changes of chemical properties
proton particles with an electrical charge of 1+
quark Protons and neutrons are made up of small particles called quarks
Created by: myashontae