Thallium element block. Atomic number eighty one. Chemical symbol Vector. Bright yellow background. EPS 10. premium vector by denistsybulsky85.gmail.com

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table eight yellow white background number graphic element illustration isolated one symbol concept two school flat visual learning education hundred property grid chemical laboratory science point system study block chemistry lesson four research mass atom atomic electron neutron proton bond seven periodic diagram molecule thirty eighty 37 81 thallium 204

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