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Periodic table Puzzle

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Across
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An element that has a symbol AG
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an element that shares properties with metals and some non-metals.
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incredibly unreactive elements
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Number 2 on the periodic table.
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The man to make the first periodic table
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The number above the element name
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The lightest element.
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Element that is liquid at room temperature.
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The rows of the periodic table are called
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the central and most important part of an element.
Down
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Are lungs need this.
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Mendeleyev wrote the weight for each element on a separate
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Most of the elements on the periodic table are
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Metals that are very reactive
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An element that has a symbol AU
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The first element made artificially.
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Keeps the pool nice and clear.
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Second element that is liquid at room temperature.
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Element used in swords and cutlery.
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Atomic number-atomic mass