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Chapter 17 vocab

QuestionAnswer
atom the smallest particle of an element that still retains the properties of the element.
nucleus positively charged center of an atom that contains protons and neutrons and is surrounded by a cloud of electrons.
proton particle, composed of quarks, inside the nucleus of an atom that has charge of 1+.
neutron neutron partice, composed of quarks, inside the nucleus of an atom.
electron particles surrounding the center of an atom that have a charge of 1-
quark particles of matter that make up protons and neutrons.
electron cloud area around the nucleus of an atom where the atom's's electrons are most likely to be found.
atomic number number of protons in an atom's nucleus.
mass number sum of the number of protons and neutrons in a n atom's nucleus.
isotope atoms of the same element that have different numbers of neutrons.
average atomic mass weighted-average mass of the mixture of an element's isotopes.
periodic table organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties.
group vertical column in the periodic table.
electron dot diagram uses the symbol for an element and dots representing the number of electrons in the element's outer energy level.
period horizontal row in the periodic table; the amount of time it takes one wavelength to pass a fixed point; is expressed in seconds.
Created by: crodriguez98
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