Overview Oxygen is the third most abundant element in the universe by mass, after hydrogen and helium, and the most abundant element by mass in the Earth's crust. Dioxygen as a gas makes up 20.9% of the volume of Earth's atmosphere, and is also present in the form of water vapor and...
Definition Oxygen is a chemical element with atomic number 8, represented by the symbol O. The name oxygen was coined in 1777 by Lavoisier. Its name derives from the Greek word "oxys" meaning "sharp," referring to the sharp taste of acids, and "gen膿s" meaning "producer." It is a ...
What is the mass number of an oxygen atom with 7 neutrons? What is the mass number of oxygen-18? What is the mass number for carbon? What is roentgenium's atomic mass? What is the mass number of the uranium-238 atom? What is the mass number of deuterium? What is the atomic mass ...
atomic number8 atomic weight15.9994 melting point−218.4 °C (−361.1 °F) boiling point−183.0 °C (−297.4 °F) density (1 atm, 0 °C)1.429 g/litre oxidation states−1, −2, +2 (in compounds with fluorine) electron config.1s22s22p4 ...
The mass number of an atom is the total number of protons and neutrons contained within the nucleus of the atom. The number of protons determines the element and will always equal the atomic number of that element. The number of neutrons can change and will determine which isotope of that ...
(atomic mass unit per elementary charge) is an important tracer for magnetospheric plasma as there is no appreciable source of sulfur from Europa compared to the Io-genic plasma dominating the magnetosphere. In contrast, H2+of Europa-genic origin is more prominently observed closer to Europa ...
Atomic mass unit (amu): A unit used to express the mass of an atom equal to exactly one-twelfth the mass of a carbon-12 atom. Isotopes: Two or more forms of an element with the same atomic number (same number of protons in their nuclei), but different atomic masses (different numb...
where gi and gj are the statistical weights of the two levels involved, nj is the atom number density of the lower level-j (at the center of the plasma), Tg is the gas temperature, M is the atomic mass, and R is the gas constant. The effective branching fraction now becomes (16)...
(O2) is the radiation chemical yield of molecules per 100 eV of the radiation energy;MO2is the O2molecular mass (g),Aizis the isotope atomic mass (g) andλis the isotope-specific decay constant (y−1). The overall (O2)tvalue summed the contributions from238U,235U,232Th and40K ...
Atomic Volume(cc/mol):14.0 Covalent Radius(pm):73 Ionic Radius:132 (-2e) Specific Heat(@20°C J/g mol):0.916 (O-O) Pauling Negativity Number:3.44 First Ionizing Energy (kJ/mol):1313.1 Oxidation States:-2, -1 Lattice Structure:Cubic ...