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This scientist coined the term "atom" and said that it was an uncuttable particle.
Democritus
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This scientist said that atoms combine in specific proportions and atoms of the same element were alike.
Dalton
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This scientist created the "plum pudding" model of the atom based on his cathode ray tube experiment.
Thomson
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This scientist said that the center of the atom was positively charged and he coined the term "nucleus" for it based on his gold foil experiment.
Rutherford
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This scientist said that electrons travel in definite paths around the nucleus.
Bohr
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These scientists cointed the term "electron cloud"
Schrodinger & Heisenberg
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Which subatomic particle has a positive charge, a mass of 1 and is found in the nucleus?
Proton
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Which subatomic particle is found in the nucleus, has a mass of 1 and has no charge?
Neutron
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Which subatomic particle has a negative charge, no mass and is found outside the nucleus?
Electron
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The number of total protons in the nucleus is known as this.
Atomic number
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The number of protons in addition to the number of neutrons is known as this.
Atomic mass
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When an atom has a different number of neutrons from its regular atom, it is known as this.
Isotope
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This is the listing of all the elements that are exiting and that have been created.
Periodic Table
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A regular repeating pattern.
Periodic
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These elements are on the left side of the periodic table, have a small number of electrons in the outer shell, are reactive, ductile, malleable and shiny.
Metals
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These elements are on the right side of the periodic table, are not shiny, ductile or malleable and are often gases.
Nonmetal
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These elements sit on the zigzag line of the periodic table and have characteristics of both metals and nonmetals.
Metalloids
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A row on the periodic table arranged by increasing atomic number.
Period
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A column or family on the periodic table made up of elements who have very similar chemical and physical properties
Group
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This is the most abundant element in the universe.
Hydrogen
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The most reactive metals on the periodic table. They have one electron in the outer level.
Alkali metals
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These nonmetals have a full outer electron shell and are unreactive or inert.
Noble gases
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These metals are the second most reactive elements on the table and have two electrons in the outer most level.
Alkali earth metals
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The most reactive nonmetals or salt formers.
Halogens
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These metals form colored solutions in water.
Transition metals
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These are the radioactive metals on the periodic table.
Actinide series
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