Daily Archives: May 21, 2015


Green Aurora in Iceland (Anne Helmenstine) 2
Oxygen is the eighth element of the periodic table. It is atomic number 8 with element symbol O. Oxygen is best known as the element we need in order to breathe, but it has many other interesting properties. These oxygen facts contain chemical and physical data along with general information and history. Basic […]

Oxygen Facts


Saturn's Moon Titan 1
Nitrogen is the seventh element of the periodic table. These nitrogen facts contain chemical and physical data along with general information and history. Basic Nitrogen Facts Name: Nitrogen Atomic Number: 7 Element Symbol: N Group: 15 Period: 2 Block: p Element Family: nonmetal Atomic Mass: [14.006 43; 14.007 28] IUPAC guidelines. For single value, use 14.0067. Electron Configuration: [He]2s22p3 (shorthand) or 1s22s22p3 (full) Discovery: Daniel Rutherford […]

Nitrogen Facts – Element Number 7 or N