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13 Cards in this Set
- Front
- Back
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nucleus
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center core of an atom, containing protons and ussualy neutrons
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proton
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a small positivly charged particle in the nucleus of the atom
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neutron
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a small particle in the nucleus with no electrical charge
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electron
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a tiny negatively charged particle that moves around the nucleus of an atom
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atomic number
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number of protons in the nucleus of an atom
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isotope
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an atom with the same number of protons and a diffeent number of neutrons from other atoms of the same element
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mass number
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sum of protons and nutrons in te nucleus
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model
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in science, a diagram, a mental picture, a mathamatical statement. or an object that helps explain ideas about the natural world
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atomic mass
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average mass of all the isotopes of the elements
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periodic table
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is a chart of the elements showing te repeating pattern of the properties
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chemical symbol
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a one or two letter reprosentation of an element
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period
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horizontal row of elemements in the periodic table
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group
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elements in the same vertical collum of the periodic table; also called family
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