- Carbon (from Latin carbo ‘coal’) is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. Carbon makes up about 0.025 percent of Earth’s crust. Three isotopes occur naturally, 12C and 13C being stable, while 14C is a radionuclide, decaying with a half-life of 5,700 years. Carbon is one of the few elements known since antiquity.
- Glengarry Glen Ross (film) (Wikipedia)
Glengarry Glen Ross is a 1992 American tragedy film directed by James Foley and written by David Mamet, based on his 1984 Pulitzer Prize-winning play. The film depicts two days in the lives of four real-estate salesmen and their increasing desperation when the corporate office sends a motivational trainer with the threat that all but the top two salesmen will be fired within one week.