Energy Definition

• Think about a common form of carbon used in pencils. It's soft and slippery, allowing it to leave a mark on paper. Can you name this form of carbon?

  Graphite
• There's another form of carbon that's known for being the hardest natural substance and is often used in jewelry. What is this crystalline form of carbon?

  Diamond
• Besides crystalline forms, carbon can also exist in a form without a definite shape. This type of carbon is often found in soot or coal. What do we call this non-crystalline form?

  Amorphous Carbon
• There is a relatively recent discovery in carbon allotropes, which are molecules composed entirely of carbon, taking the form of a hollow sphere, ellipsoid, or tube. Can you name one of these structures, often resembling a soccer ball?

  Fullerenes
• Think about a cylindrical structure formed by carbon atoms, which is known for its strength and electrical properties. What is the name of this cylindrical form of carbon?

  Carbon Nanotubes
• Consider a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice. This material is known for its exceptional electrical and mechanical properties. Can you identify this one-atom-thick form of carbon?

  Graphene