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R The Periodic Table. D'Mitri Mendeleev 1860's First to publish Placed similar elements in same vertical column Left open spaces for elements he predicted. - ppt download
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The element Rhenium (Re) as seen on a periodic table chart as used in a UK school Stock Photo - Alamy
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R 2 metric applied to modeled elements across the first five periods of... | Download Scientific Diagram
The Politically Correct Periodic Table of the Elements - Science History Institute Digital Collections
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Elements in periodic table. Green is the available in the game as its pure form. Orange is which find only as chemical compound with other elements: Lime (CaCO³); Salt (NaCl¹); Oxylite (Ir³O²);
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