- 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.
- Ms. Pac-Man (Wikipedia)
Ms. Pac-Man is a 1982 maze arcade video game developed by General Computer Corporation and published by Midway. It is a spin-off sequel to Pac-Man (1980) and the first entry in the series to not be made by Namco. Controlling the title character, Pac-Man’s wife, the player is tasked with eating all of the pellets in an enclosed maze while avoiding four colored ghosts. Eating the larger “power pellets” lets the player eat the ghosts, who turn blue and flee.