Diamond has the highest breakdown electric field of what?
A: Any known material.
Diamond is the best known naturally occurring thermal what?
Atomic carbon is very short-lived and, therefore, carbon is
stabilized in various multi-atomic structures with different molecular
configurations called what?
At very high pressures carbon forms the more compact
allotrope called what?
Fullerenes have a graphite-like structure, but instead of
purely hexagonal packing, they also contain pentagons (or even heptagons) of
A: Carbon atoms, which bend the sheet into spheres, ellipses or cylinders.
Carbon is abundant in the Sun, stars, comets, and in the
atmospheres of most what?
It has been estimated that the solid earth as a whole
contains how much carbon?
A: 4360 million gigatonnes.
About what percentage of all industrial diamonds used in
the U.S. are now made synthetically?
Carbon-14 is formed in upper layers of the troposphere and
the stratosphere by a reaction that is precipitated by what?
A: Cosmic rays.
To form a carbon atomic nucleus requires a almost
simultaneous triple collision of alpha particles (helium nuclei) within the core
of a what?
A: A giant or supergiant star.
No significant carbon was created during the what?
A: Big Bang.