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unit 1

atomic struture

atom p.507 the smallest piece of matter that still retains the property of of the element.
atomic number p.513 number of protons in an atom's nucleus
average atomic mass p.515 the weighted-average mass of the mixture of it's isotopes
electrons p.507 particles with an electrical charge of 1-
electron cloud p.511 the area around the nucleus of an atom where it's electrons are most likely found.
electron dot gram p.522 the symbol of the elements and dots to represent the electrons in the outer energy level
group p.520 the vertical columns in a periodic table
isotope p.514 atoms of the same element that have different numbers of neutrons.
mass number p.513 the sum of number of protons and the number of neutrons in the nucleus of an atom
neutrons p.507 neutral particles that do not have an electrical charge
nucleus p.507 the positively charged center of a nucleus
period p.523 the horizontal rows of elements on the periodic table
periodic table p.516 elements arranged by increasing atomic number and by changes in physical and chemical properties
protons p.507 particles with an electrical charge of 1+
quark p.507 small particles that make up protons and nuetrons
Created by: elijahsanders