Symbol: C; atomic no: 6; atomic wt: 12.011; valency: 2, 3, or 4; relative density: 1.8–2.1 (amorphous), 1.9–2.3 (graphite), 3.15–3.53 (diamond); sublimes at 3367±25°C; boiling pt: 4827°C 1. Symbol C A naturally abundant, nonmetallic element that occurs in all organic compounds and can be found in all living things. Proteins, sugars, fats, and even DNA all contain many carbon atoms.
a nonmetallic element found combined with other elements in all organic matter and in a pure state as diamond and graphite. Diamonds and graphite are pure forms, and carbon is a major part of coal, petroleum, and natural gas. The element carbon is also important, however, outside the chemistry of living things.
In succeeding years many further specimens have been found, not only in the German Neander Valley, but in with rickets, caused by a deficiency of vitamin D.
He considered that the flattened head was caused by repeated powerful blows (his examination was done pre Darwinism 1859).
Nearby, workers also uncovered an assortment of thick and heavily fossilized bones.
Carbon can bond to itself and forms an enormous number of important molecules, many of which are essential for life. The two most familiar forms of carbon—diamond and graphite—differ greatly because of the arrangement of their atoms.
In diamond, each carbon atom bonds to four others in a dense network that makes the material the hardest substance known.
This black soot, also known as lampblack, gas black, channel black or carbon black, is used to make inks, paints and rubber products.
It can also be pressed into shapes and is used to form the cores of most dry cell batteries, among other things.