. In the modern periodic table, group 18 belongs to noble gases. They have low boiling points. This page provides supplementary data about the noble gases, which were excluded from the main article to conserve space and preserve focus. The nobel gases have high ionization energy and very low electron affinity. Oganesson mostly not included due to the amount of research known about it. From top to bottom: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and Radon (Rn). Radon is the only radioactive out of all. Physical property Helium Neon Argon Their boiling points increase from top to bottom of group. The noble gases (historically also the inert gases; sometimes referred to as aerogens) make up a class of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity.The six naturally occurring noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). Each element is non-reactive, has high ionization energy, electronegativity near zero, and a low boiling point. On the right (highlighted in orange) is the group of noble gases. Each element can usually be classified as a metal or a non-metal based on their general Chemical and Physical Properties. Because of their full outer shells, they are very inert and stable. The noble gases are also known as the inert gases. The noble gases are the chemical elements in group 18 of the periodic table. Helium has two electrons in its outer shell and the rest have eight electrons. The noble gases were characterized relatively … Then these and other properties of noble gases will be explored. The non- reactivity of noble gases is due to the following reasons: The valence shell of the noble gases is completely filled. Due to their close octets the noble gase’s have very high values of ionization energy. The Noble Gases The Noble Gases (inert gases, Group 0, Group 18 or the helium group) are notoriously unreactive elements (‘noble’ means unreactive in chemistry) and in their elemental state they ... properties of the liquid suddenly change, it becomes a superfluid. This group consists of a chemical series of gases including Argon, helium, neon, krypton, xenon, and radon. What are Noble Gases? The elements in the last column or group of the periodic table share special properties. The next available shell is of much higher energy. This means they don't tend to react with other elements to form compounds. The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactive. Define Noble Gases Noble Gases are used as a term in Periodic Chemistry when classifying the chemical elements. Noble gases share many similar properties including: A full outer shell of electrons. Physical Properties of noble-Gases: All the noble-gase’s ( Except He) are close octets. Noble gases have very high ionization enthalpies. Noble gas is translated from the German noun Edelgas, first used in 1898 by Hugo Erdmann to indicate their extremely low level of … Physical properties Solid. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. The noble gases do not react under normal conditions. 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