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Actinium, on the periodic table. Radioactive metal, with element symbol Ac and atomic number 89. Name giver of actinide series, named after Greek aktis, for beam or ray. No significant industrial use.
91 Protactinium Icon, Vector Illustration For Web Use
Mandeleev Periodic table of the chemical elements chart illustration vector multicolor 118 elements in english language
Periodic table of the chemical elements chart illustration vector multicolor 118 elements in english language
91 Protactinium Icon, Simple Vector Illustration For Web Use
Periodic table of the chemical elements illustration vector multicolor 118 elements two separate layer for symbols and background
91 Protactinium Icon, Simple Vector Illustration For Web Use