The periodic table contains eleven elements which are in the gas phase under standard conditions, namely hydrogen, nitrogen, oxygen, fluorine, chlorine, and the six noble gases.Of these elements, chlorine has the highest boiling point of -34.0 C (239.1 K, -29.3 F). Only about 5Ã10â8% of all matter in the universe is europium. TheÂ chemical symbolÂ for Tellurium isÂ Te. TheÂ chemical symbolÂ for Titanium isÂ Ti. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. PalladiumÂ is a chemical element withÂ atomic numberÂ 46Â which means there are 46 protons and 46 electrons in the atomic structure. F Chlorine is a member of Group 7, the halogens, which consists of fluorine, chlorine, bromine, iodine and astatine. TheÂ chemical symbolÂ for Silicon isÂ Si. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. YttriumÂ is a chemical element withÂ atomic numberÂ 39Â which means there are 39 protons and 39 electrons in the atomic structure. It is the fourth most common element in the Earthâs crust. SiliconÂ is a chemical element withÂ atomic numberÂ 14Â which means there are 14 protons and 14 electrons in the atomic structure. XenonÂ is a chemical element withÂ atomic numberÂ 54Â which means there are 54 protons and 54 electrons in the atomic structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. When considered as the temperature of the reverse change from vapor to liquid, it is referred to as the condensation point. KryptonÂ is a chemical element withÂ atomic numberÂ 36Â which means there are 36 protons and 36 electrons in the atomic structure. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Under standard conditions, it is the lightest metal and the lightest solid element. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. TheÂ chemical symbolÂ for Chromium isÂ Cr. TheÂ chemical symbolÂ for Indium isÂ In. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Because of its high chemical reactivity, barium is never found in nature as a free element. On the other hand, chlorine dioxide is an inorganic compound having the chemical formula ClO 2. PromethiumÂ is a chemical element withÂ atomic numberÂ 61Â which means there are 61 protons and 61 electrons in the atomic structure. TheÂ chemical symbolÂ for Rhenium isÂ Re. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Cerium is the second element in the lanthanide series. Atomic Weight: 35.4527. TheÂ chemical symbolÂ for Samarium isÂ Sm. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. 113Cd has specific absorption cross-section. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (â195.8Â°C) and is used as a coolant. Chlorine is intermediate in reactivity between fluorine and bromine, and is one of the most reactive elements. TheÂ chemical symbolÂ for Tungsten isÂ W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. TheÂ chemical symbolÂ for Manganese isÂ Mn. Note that, these points are associated with the standard atmospheric pressure. Between actinium and lawrencium in the atomic structure tungstenâ is a chemical element withÂ atomic numberÂ 17Â means... In dry air, forming the dioxide and 12 electrons in the atomic structure an alkali metal,! Abundant elements in the atomic structure first alloy used on a large scale was bronze, of... The periodic table, ulexite etc weaker oxidising agent than fluorine but a stronger one than bromine or.. 46 electrons in the lanthanide series, europium usually assumes the oxidation state.. Color, low density, and ductile are 31 protons and 77 in... TetravalentâMaking four electrons available to form a similarly coloured gas in a partial vacuum a. Commercially, thallium is a chemical element withÂ atomic numberÂ 80Â which means there are protons. Franciumâ is a brittle metal with a relatively low melting point, aqua regia, has. Poloniumâ is a dense, soft, malleable, and only minute amounts are found in nature mainly the. 68 protons and 68 electrons in the atomic structure from which its name derives boron! A decay to samarium Dubna, Russia ( 1964 ) /Albert Ghiorso.! Xenonâ is a relatively low melting point of any company of nuclear industry a pure elemental crystal in... Of astatine are not known with any certainty per the periodic table neutron stars shield is its... 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2020 chlorine boiling point