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Tic Tac Toe

Troy Franklin 
McMurchy
SC2
2-4-19
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Across
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The number at the bottom of an atom that you subtract from the atomic number to get the number of protons
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The particle in an atom that contains a negative charge.
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The particle everything in the universe is made of.
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A change in an object that can be reversed.
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6 elements including beryllium, magnesium, and calcium
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The particle in an atom carrying a neutral charge.
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6 elements including lithium,sodium, and potasium
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The most simplified substance in chemistry.
Down
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The particle in an atom that holds a positive charge.
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35 elements including, nickel, mercury and gold.
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A change in an object that cant be reversed.
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The number that tells how many protons and electrons are in an atom.
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6 elements including neon, argon, and helium.
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5 elements including, florine chlorine and iodine.
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6 elements including boron, silicon and tellurium