4. Carbon is made in the interiors of stars,
d. and has been known since prehistoric time.
5. Carbon compounds have limitless uses. In its
elemental form, diamond is a gemstone and used
for drilling/cutting; graphite is used in pencils, as
a lubricant, and to protect against rust;
e. forming nearly ten million compounds.
6. Carbon has the highest melting/sublimation point
of the elements. The melting point of diamond is
~3550°C,
f. hydrogen, helium, and oxygen are found in
higher amounts, by mass.
7. Pure carbon exists free in nature
g. although inhalation of fine particles, such as
soot, can damage lung tissue.
8. The origin of the name 'carbon' comes from the
Latin word carbo, for charcoal.
h. The German and French words for charcoal are
similar.
9. Pure carbon is considered non-toxic,
i. while charcoal is used to remove toxins, tastes,
and odors.
10. Carbon is the fourth most abundant element in
the universe
j. with the sublimation point of carbon around
3800°C.
Name the types of carbon structures. If necessary, use the Internet.
a.
b.
c.
d.
e.
f.
42
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