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Atmosphere: The gaseous or air portion of the physical environment that encircles a planet. In the case of the earth, it is held more or less near the surface by the earth's gravitational attraction. Th . . . View Full Definition

Standard Atmosphere: A standard atmosphere has been defined by the International Civil Aeronautical Organization (ICAO). It assumes a mean sea level temperature of 15°C a standard sea level pressure of 1,013.25 . . . View Full Definition

Standard Air (Standard Atmosphere): An arbitrary atmosphere established for calibration of aircraft instruments. Standard Air Density is 29.92 inches of mercury and temperature of 59° F, equivalent to an atmospheric air pressu . . . View Full Definition

Atmosphere (Atm): A unit of pressure, equal to a barometer reading of 760 mm Hg. 1 atmosphere is 101325 pascals and 1.01325 bar.

Atmosphere (Unit): A unit of pressure equal to 101,325 newtons per square meter, or about 14.7 pounds per square inch.

Protective Atmosphere: A gas or vacuum envelope surrounding the workpieces, used to prevent or reduce the formation of oxides and other detrimental surface substances and to facilitate their removal.

Lead (Pb): Atomic number: 82, Atomic mass: 207.2 g.mol -1, Electronegativity: 1.8, Density: 11.34 g.cm-3 at 20°C, Melting point: 327 °C, Boiling point: 1755 °C, Vanderwaals radius: 0.154 nm, Ionic radi . . . View Full Definition

Neon (Ne): Atomic number: 10, Atomic mass: 20.179 g.mol -1, Electronegativity: unknown, Density: 0.9*10 -3 g.cm-3 at 20°C, Melting point: -249 °C, Boiling point: -246 °C, Vanderwaals radius: 0.16 nm, I . . . View Full Definition

Krypton (Kr): Atomic number: 36, Atomic mass: 83.80 g.mol -1, Density: 3.73 10-3 g.cm-3 at 20°C, Melting point: - 157 °C, Boiling point: - 153° C, Vanderwaals radius: 0.197 nm, Isotopes: 15, Electronic sh . . . View Full Definition

Carbon (C): Atomic number: 6, Atomic mass: 12.011 g.mol -1, Electronegativity: 2.5, Density: 2.2 g.cm-3 at 20°C, Melting point: 3652 °C, Boiling point: 4827 °C, Vanderwaals radius: 0.091 nm, Ionic radiu . . . View Full Definition