![]() Political stability of top reserve holderĪ percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators.īefore it was isolated, the space it left in the periodic table was the source of years of frustration. The higher the value, the larger risk there is to supply.Ī percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. The percentage of the world reserves located in the country with the largest reserves. The higher the value, the larger risk there is to supply. The percentage of an element produced in the top producing country. ![]() Low = substitution is possible with little or no economic and/or performance impact Medium = substitution is possible but there may be an economic and/or performance impact High = substitution not possible or very difficult. The availability of suitable substitutes for a given commodity. A higher recycling rate may reduce risk to supply. The percentage of a commodity which is recycled. ![]() The number of atoms of the element per 1 million atoms of the Earth’s crust. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores. The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems.ĭata for this section been provided by the British Geological Survey.Īn integrated supply risk index from 1 (very low risk) to 10 (very high risk). Where more than one isotope exists, the value given is the abundance weighted average.Ītoms of the same element with different numbers of neutrons. This is approximately the sum of the number of protons and neutrons in the nucleus. The mass of an atom relative to that of carbon-12. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase.ĭensity is the mass of a substance that would fill 1 cm 3 at room temperature. The temperature at which the liquid–gas phase change occurs. The temperature at which the solid–liquid phase change occurs. The arrangements of electrons above the last (closed shell) noble gas. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). The atomic number of each element increases by one, reading from left to right.Įlements are organised into blocks by the orbital type in which the outer electrons are found. Members of a group typically have similar properties and electron configurations in their outer shell.Ī horizontal row in the periodic table. However, under very high pressure and temperature, it can form compounds with other elements, such as fluorine.A vertical column in the periodic table. Neon is a noble gas and does not react with other elements under normal conditions. Neon is used as a cryogenic refrigerant in some low-temperature applications. It is used in gas lasers, such as helium-neon lasers. Neon is used in neon lighting and advertising signs. It has eight valence electrons and a full octet. Neon has an electron configuration of 2s 2 2p 6. It does not form chemical bonds with other elements. Neon is a noble gas and is not ductile or malleable.It has a boiling point of -246.1☌ and a melting point of -248.6☌.Neon is a colorless, odorless gas at room temperature and pressure. ![]() Neon has a very low boiling point and is a gas at room temperature.It does not make compounds with other elements under normal pressure and temperature conditions.Neon is a noble gas and is therefore chemically inert.The chemical and physical properties of neon, its valency, electronic configuration, uses, reactions with other elements, and industrial and medical applications are discussed below. It is a noble gas and is the fifth most abundant element in the universe. Neon is a chemical element – Its symbol is Ne and the atomic number is 10.
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