. . . . . . . . "any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter"@en-us . . . . "113785984"@en-us . . . "0.5"^^ . . . "element"@en-us . . "110473879"@en-us . "chemical element"@en-us . . "14622893-n"^^ . . . . . . "114622893"^^ . . . . "chemical element"^^ . . . . . . "0"^^ . . . . . . . . . . . . . . . . . . . . .