Atomic number: 6
Category: non metal
Density at 25°C: solid, varies from 1.8 to 3.515
Carbon is perhaps one of the most familiar elements as it is often very easy to obtain in almost pure form. It is contained in all living systems, hence the term carbon based life form. Carbon is also, ironically, the gold standard for calculating the amount of substance in a sample (mole) of gold or any element for that matter.
Use, natural applications or common combinations:
- just about everything, all life
- special forms, especially graphite, diamond, buckyballs
- Standard atomic weight: [12.0096; 12.0116] why this variation?
- Melting point:
- it doesn't melt at normal pressures, it becomes a gas (sublimes) at 5,530 °C
- Boiling point: 3927 °C
- selected isoptopes: 14C half life 5,730 years via beta- decay to become 14N