![]() (✬) -246 Earth's crust abundance (ppm) 0.005 Isotope (abundance %) 20Ne (90.48), 21Ne (0.27), 22Ne (9.25) Density (g/cm 3) 0.9 vdW radius (pm) 154 Covalent radius (pm) 62 Electronegativity (Pauling) Vaporisation enthalpy (Kj/mol) 1.71 Fusion enthalpy (kJ/mol) 0.33 Specific heat capacity (J/g Symmary of properties (Ne) Atomic weight 20.1797(6) Discoverer (year) Ramsay, William & Travers, Morris (1898) Natural form gas Electron configuration 2 s 2 2 p 6 M.p. These spectra are usefull to identify the elements present in a sample. This results in a characteristic emission line in the spectra (which corresponds to specific wavelengths of light). When an electron in an atom is excited to a higher energy level, it can de-excite by emitting a photon of light with an energy equal to the difference between the two levels. The orbitals are filled in a specific order, starting with the lowest energy orbital and working up.Įach element in the periodic table presents its own unique emission spectra, which is determined by the energy levels of its electrons. In the electron configuration notation, the letters "s", "p", "d", and "f" represent the different types of atomic orbitals, and the superscripts indicate the number of electrons in each orbital. The electron configuration of an element describes the arrangement of electrons in the atoms of that element, and be used to predict its chemical properties and reactivity. ![]() It is also used in the production of certain chemicals. However, it is more commonly used in lighting, such as in illuminated signs or as bright warning beacons on airport runways. This element can be mixed with helium to create research lasers. Pure neon is a transparent gas, which is extracted by cooling the air to a temperature of -189.34 ☌ (-189.34 ☏), through a process called fractional distillation. ![]() Part of this percentage was lodged in the rocks of the Earth when the planet was formed, and was released into the air by volcanic eruptions. Neon is a rare element, making up only 0.001% of our atmosphere. It is a colorless, odorless, tasteless, and non-toxic gas that is the second lightest noble gas in the periodic table. Neon is a chemical element with the symbol Ne and atomic number 10.
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