### element | carbon | fullerene:

Nanotube
* Some nanotubes measure just a nanometer in diameter.
* are a proving to be useful as molecular components for nanotechnology
  - variation of the all-carbon hollow molecules called fullerenes
* are also good for electrical purposes
  - very good electrical conductors
  - artifacts
  - just one of several candidates for the next generation of electronics
  - miniscule cylinders made of atoms of carbon, nitrogen, boron, or other materials
  - molecular-sized pipes made of carbon atoms
  - sheets of carbon atoms rolled into a tube
  - similar to fullerenes, but they're cylindrical
  - smalls
  - thin, elongated versions of buckminsterfullerenes
* are tiny carbon pipes only a few atoms wide
  - cylinders of carbon atoms
  - truly wonder molecules
  - very strong - one of the strongest materials, as a matter of fact
  - very, very tiny, hollow tubes made of carbon
* can also conduct electricity, as semiconductors
  - be semiconductors or metals depending on their detailed atomic structure
* differ only in that they are strands rather than spheres.
* elastically buckle rather than break when deformed, which results in highly robust probes.
* exhibit some peculiar characteristics.
* get as small as they can.
* have some physical properties that have no counterpart in macroscopic materials
  - the potential for use as minuscule wires or in ultrasmall electronic devices
* offer considerable advantages over cut, etched, or otherwise sharpened metal tips.

### element | carbon:

Graphite
* Most graphite has layer structures
  - molecular structures
  - is produced through the metamorphism of organic material in rocks
* Some graphite has energy
  - high thermal stability
  - layers
  - is found in igneous rocks and also as nodules inside of iron meteorites
* conducts conductivity
  - electrical conductivity
  - heat
* consists of flat sheets of interlinked carbon atoms
  - layers of carbon atoms
* consists of sheets of strongly bonded hexagonal rings
  - or layers of graphene
* facilitates the fission chain reaction in a graphite reactor by slowing neutrons.
* includes atoms.
* is located in pencils
  - minerals
* occurs as large bodies within iron or in separate masses.
* provide great lubricity, but depend on oils for preservative qualities.
* works well as a lubricant.

### element | carbon | graphite:

Flake graphite
* can be four times the price of amorphous.
* is opaque, flexible and sectile, and exhibits perfect basal cleavage.

Inorganic carbon
* comes from non-living sources, like rocks.
* large part of the total carbon.

Organic carbon
* comes from living or once-living things, including fossil fuels.
* has an important role in carbon cycling in the ocean.
* is converted to carbon dioxide and hydrogen to water vapor
  - the primary pollutant the two are trying to control with wetlands
* quantitative measure of organic matter.
* semi-volatile hydrocarbon from combustion and some evaporative sources.
* stored in the geosphere can remain there for millions of years.

Soot
* Some soot absorbs light.
* can be airborne or collect on a surface such as a chimney or flue liner.
* factor in a number of respiratory ailments, including asthma
  - asthma and other respiratory ailments
* is amorphous, so the atoms are randomly stuck together
  - blackness
  - flammable
  - primarily unburned carbon
  - usually an undesirable product of combustion for several reasons
* major atmospheric pollutant.
* natural by-product when things are burned.

### element | carbon | soot:

Black soot
* can be a problem, especially with candles made of inferior waxes and fragrances.
* is the product of the incomplete combustion of carbon-containing fuels.

Diesel soot
* is even worse for public health than other types of soot pollution.
* toxic air pollutant linked to human cancer.