allotrope: a structurally different form of an element
chemical element: 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
scientology: a new religion founded by L. Ron Hubbard in 1955 and characterized by a belief in the power of a person's spirit to clear itself of past painful experiences through self-knowledge and spiritual fulfillment