periodic table
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periodic table |
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| navigate by keyword : atom atomic button chemistry concept education electrons element elements graphic group icon illustration isolated lab laboratory metals mineral minerals neptunium nickel niobium nitrogen nobelium nonmetal number osmium oxygen palladium period periodic phosphorus platinum plutonium polonium potassium praseodymium promethium protactinium protons school science scientific sign structure symbol table weight |
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| 3d chemical elements of the periodic table |
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