10
Ne
20.1797
Neon
Noble Gas
Group 18
Period 2
Block p
Gas
Neon is a chemical element of the periodic table with chemical symbol Ne and atomic number 10 with an atomic weight of 20.1797 u and is classed as noble gas and is part of group 18 (noble gases). Neon is gas at room temperature.
Neon in the periodic table
| Symbol | Ne |
| Atomic number | 10 |
| Group | 18 (Noble gases) |
| Period | 2 |
| Block | p |
| Classification | Noble Gas |
| Appearance | Colorless gas exhibiting an orange-red glow when placed in a high voltage electric field |
| Color | Colorless |
| Number of protons | 10 p+ |
| Number of neutrons | 10 n0 |
| Number of electrons | 10 e- |
From Wikipedia, the free encyclopediaNeon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
Physical properties
| Phase at STP | Gas |
| Density | 0.9002 g/cm3 |
| Atomic weight | 20.1797 u |
Thermal properties
| Melting point | 24.56 K -248.59 °C -415.462 °F |
| Boiling point | 27.104 K -246.046 °C -410.8828 °F |
| Heat of vaporization | 1.77 kJ/mol |
Atomic properties
| Electronegativity (Pauling Scale) | - |
| Electron affinity | -116 kJ/mol |
| Oxidation states | 0 |
| Ionization energies |
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Electron configuration for neon
Electron configuration Shorthand configuration | [He] 2s2 2p6 | ||||||||
| Full configuration | 1s2 2s2 2p6 | ||||||||
Electron configuration chart |
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| Electrons per shell | 2, 8 | ||||||||
| Valence electrons | 8 | ||||||||
| Valency electrons | 0 | ||||||||
| Bohr model | Figure: Shell diagram of Neon (Ne) atom. | ||||||||
Orbital Diagram |
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The history of Neon
| Prediction | William Ramsay (1897) |
| Discovery and first isolation | William Ramsay, Morris Travers (1898) |
Discovery of neon Neon was discovered in 1898 by the British chemists Sir William Ramsay (1852–1916) and Morris Travers (1872–1961) in London. Neon was discovered when Ramsay chilled a sample of air until it became a liquid, then warmed the liquid and captured the gases as they boiled off. The gases nitrogen, oxygen, and argon had been identified, but the remaining gases were isolated in roughly their order of abundance, in a six-week period beginning at the end of May 1898. First to be identified was krypton. The next, after krypton had been removed, was a gas which gave a brilliant red light under spectroscopic discharge. This gas, identified in June, was named "neon", the Greek analogue of the Latin novum ('new') suggested by Ramsay's son. The characteristic brilliant red-orange color emitted by gaseous neon when excited electrically was noted immediately. Travers later wrote: "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget." | |
| Original word | neos |
| Language of origin | Greek |
| Name source | Properties |
| Meaning | “New” |
Naming The name is derived from the Greek word, νέον, neuter singular form of νέος (neos), meaning 'new'. | |