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15 Cards in this Set

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  • Back
Atom
the smallest piece of matter that still remains the property of the element
Nucleus
the small, postively-charged center of the atom
Electron
particles with an electrical charge of 1-
Proton
particles with an electrical charge of 1+
Nuetron
neutral particles that do not have an electrical charge
Quark
smaller particles that make up protons and neutrons
Electron cloud
the area around the nucleus of an atom where its electrons are most likely found
Atomic number
the number of protons in an atom
Mass number
the sum of the number of protons and the number of neutrons in the nucleus of an atom
Isotopes
atoms of the same element that have different numbers of neutrons
Average atomic mass
the weighted-average mass of the mixture of its isotopes
Periodic table
the elements are arranged in increasing atomic number and by changes in physical and chemical properties
Group
the vertical columns in the periodic table
Electron dot diagram
uses the symbol of the elements and dots to represent the electrons in the outer energy level
period
the horizontal rows of elements on the periodic table