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The Periodic Table

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Across
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The atomic number of an element is the number of ______ in its atom
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Elements are arranged in the periodic table in order of their _______ atomic number
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Each element on the periodic table has a name, a ______, and its atomic number and atomic weight/mass
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he periodic table of elements is important because it provides a guide for scientists in conducting research and experiments with elements
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Dimitri Mendeleev is credited with creating the first ________ table of elements
Down
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The ______ of elements is a chart that organizes and displays all the known elements in a specific order
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Mendeleev organized the elements by their weight and grouped elements with similar properties together
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There are about 118 known _______
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Atoms or elements are considered as the _______ blocks for all matter in the universe
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An element is a material that is made up of a single kind of ________