The "activated" form of this element is used to purify water.
Water gas is formed by passing steam over this element. This element forms the anode in the Hall-Heroult process. Ionic salts of it with silicon and boron are two of the hardest known compounds. The "activated" form of this element is used to purify water. This element is produced when sulfuric acid dehydrates glucose. Andre Geim [GYME] used Scotch tape to isolate a (*) 2D form of this element. This element forms a 60-atom cage with pentagonal and hexagonal faces that was named for architect R. Buckminster Fuller. An isotope of this element has a half-life of 5760 years. For 10 points, name this element whose allotropes include graphite and diamond.
Water gas is formed by passing steam over this element. This element forms the anode in the Hall-Heroult process.
carbon [or C]