. "chemical element"@en . _:vb50935285 ":arcc045b728" . _:vb50935285 . "SIO_010037" . "A chemical element is a (effectively) homogeneous substance composed of one type of atom."@en . _:vb50935285 . _:vb50935285 . _:vb50935285 . _:vb50935285 . . . .