How the character is built
The 石 radical marks this as a solid non-metal, and that is not a coincidence of this one character — it holds right across the table. Read the radical first and the element's state at room temperature is already settled.
Do not confuse 碳 (the element) with its homophone 炭 tàn 'charcoal' — the element character adds 石 to the older word.
Where you actually meet it
二氧化碳 (èryǎnghuàtàn) carbon dioxide
The element itself
Carbon manages to be both the softest mineral you will handle and the hardest, depending purely on how the atoms are stacked — sheets that slide past each other in graphite, a rigid three-dimensional lattice in diamond. Diamonds form well over a hundred kilometres down in the mantle beneath the oldest, coldest cores of continents, and reach the surface only in kimberlite, a rare magma that arrives fast enough that the crystals do not have time to revert to graphite on the way up. The diamonds are usually far older than the eruption that delivered them; the volcano is the courier, not the maker.
Where it sits among the 118
Carbon is one of the fourteen elements that were known before anyone was keeping records of who found what.
In living things
Carbon is roughly half the dry weight of anything alive, for a reason that is chemical rather than sentimental: carbon–carbon bonds are strong enough to hold a structure together for years yet weak enough for enzymes to rearrange them at body temperature, and carbon will bond to itself in chains, branches and rings without limit. All of it enters the living world through a single reaction, in which the enzyme rubisco clamps carbon dioxide onto a five-carbon sugar. Rubisco is probably the most abundant protein on the planet and also one of the most sluggish, fixing only a few molecules a second and regularly grabbing oxygen by mistake — plants compensate by making staggering quantities of it.
In Chinese history and language
Chinese ink is elemental carbon — soot from burnt pine or lamp oil, bound with animal glue, pressed into a cake, dried, then ground fresh on a stone with a little water each morning. The ink stick 墨 mò is one of the 文房四宝 wénfáng sìbǎo, the Four Treasures of the Study, beside brush, paper and inkstone, and fine ones were collected, moulded and inscribed like small sculptures rather than used. Because the pigment is carbon and carbon does not fade, thousand-year-old writing on silk and paper is still as black as the day it was laid down.
Where it comes from in China
Carbon's Chinese geography is coal and graphite. The coal is above all Shanxi's, in Carboniferous and Permian beds laid down in coastal swamps on the flat North China platform and still lying nearly horizontal, which is exactly what makes them easy to work. The graphite is Heilongjiang's, where carbon-rich sediments were buried, heated and squeezed until their organic matter reorganised itself into large flakes — and since flake size sets the value, the metamorphism is the whole story.
The full entry
For stroke order, example sentences, audio and the complete set of meanings, see the dictionary entry.
碳Carbon in the dictionary →Others built the same way
Every one of these carries 石, and every one is a solid non-metal.