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Atoms- Chapter 4 & 5 Final

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Across
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A negatively charged electrode.
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Atoms are electrically _____.
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Each horizontal row of the periodic table is called a _____.
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The electrons orbiting the nucleus make up most of the _____ of the atom.
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_____ believed that atoms were indivisible and indestructible.
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The number of protons and neutrons in the nucleus give the _____ number.
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Subatomic particles with a negative charge.
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Subatomic particles with a neutral charge.
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The number of protons in the nucleus of an atom gives the _____ _____.
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Elements are different because they contain a _____ number of protons.
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The number of protons equals the number of electrons in the atom of an _____.
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Protons have a ____ of about 1840 times that of an electron!
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Protons and neutrons are found in the _____ of an atom.
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Each perpendicular column of the periodic table is called a _____.
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The atomic number identifies the _____.
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J.J. ____ discovered electrons.
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Neutrons were discovered by James _____.
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Electrons are found in _____ around the nucleus.
Down
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The periodic table allows you to _____ properties of different groups of elements.
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A positively charged electrode.
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The mass of a _____ is approximately equal to the mass of a proton.
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Isotopes of an element have different _____ _____.
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The periodic table is organized by repeating _____.
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_____ of an element have the same number of protons but different numbers of neutrons.
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_____ Atomic Theory has four main components to explain atoms.
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Subatomic particles with a positive charge.
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The smallest particle of an element that retains its identity in a chemical reaction.
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The _____ pudding model of an atom was incorrect.
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The nucleus was discovered using the _____-___ experiment.
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Goldstein discovered the _____ using the cathode-ray experiment.