Four radioactive isotopes of livermorium are known, the longest half-life lasting about 60 milliseconds. Atomic Weight: 238.00 Melting Point: 1132C Boiling Point: 3818C Phase at STP: Solid Electronic Configuration: [Rn]5f36d17s2Common Oxidation States: +6,3,4,5 Number of Valence Electrons: 6. Pure thorium is a silvery-white metal that slowly tarnishes in air to gray and black. Found primarily in chromite ore, it is usually produced by reducing the oxide with aluminum. Silicon is present in the sun and stars and in meteorites known as aerolites. Samarium was first discovered spectroscopically in 1879 in the mineral samarskit. 1) chlorine2) copper3) helium4) sulfurplease explain why. Atomic Weight: (257) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: [Rn]5f127s2Common Oxidation States: +3 Number of Valence Electrons: 2. Ordinary tin is a silver-white, malleable metal that is somewhat ductile and highly crystalline. Gold is found as a free metal in nature, occurs in veins and alluvial deposits, and is associated with tellurides, quartz, and pyrite. 1. xenon 2. silicon 3. platinum 4. hydrogen It was deemed a new element in 2015 and named in 2016. The most stable isotope and the medically useful form are produced synthetically. It is highly reflective, hard, and durable. Which element is malleable and a good conductor of electricity at Artificial radioisotope I-131 is used to treat thyroid gland conditions. Gallium is usually found in diaspore, sphalerite, germanite, bauxite, and coal. Lanthanides oxidize rapidly in moist air, dissolve quickly in acids, and react slowly with oxygen at room temperature. Both curium-242 and curium-244 have been used as power sources for space and medical applications. Theyre also used in photocells, infrared optical materials, and specialty glass. The element does not exist in pure form it would be vaporized instantly by the heat of its own radioactivity. Shop Inorganic Iridium Compounds Browse All Products Containing Iridium , Atomic Weight: 192.2 Melting Point: 2410C Boiling Point: 4130C Phase at STP: Solid Electronic Configuration: [Xe]4f145d76s2Common Oxidation States: +4,3,6 Number of Valence Electrons: 9. The metal oxidizes easily and must be kept under petroleum or other oxygen-free liquids. Gallium forms a mirror when painted on glass and is widely used in semiconductors, transistors, and other solid-state devices. High-purity sulfur is commercially available in purities of 99.999+%. It can also be used as a battery anode material and in glasses and ceramics. In 1940, researchers bombarded uranium with neutrons to form a new element named "neptunium." Yttrium was discovered in 1794 and is found in nearly all of the rare-earth minerals. Its more metallic than iodine, though its compounds are similar to iodine compounds, and its likely to accumulate in the thyroid gland. All of the classifications include the elements gallium, indium, tin, thallium, lead, and bismuth. Naturally occurring barium is a mixture of seven stable isotopes, and 22 radioactive isotopes are known to exist. Shop Inorganic Aluminum Compounds Browse All Products Containing Aluminum , Atomic Weight: 26.98 Melting Point: 660C Boiling Point: 2467C Phase at STP: Solid Electronic Configuration: [Ne]3s23p1Common Oxidation States: +3 Number of Valence Electrons: 3. Manganese is currently obtained from ores and minerals that include pyrolusite and rhodochrosite. Indium is critical to modern technology, especially in the semiconductor industry. It is not found free in nature, but as orthoboric acid in volcanic spring waters and as borates. The existence of germanium was predicted by Mendeleev (who called it ekasilicon). Atomic Weight: 231.00 Melting Point: 1570C Boiling Point: 4000C Phase at STP: Solid Electronic Configuration: [Rn]5f26d17s2Common Oxidation States: +5,4 Number of Valence Electrons: 5. Relatively stable in air, yttrium has a silver-metallic luster. a- xenon b- silicon c- platinum d- hydrogen Answers C- Platinum because it is a metal and Based on scientific calculations, its basic properties are likely to resemble cobalt, rhodium, and iridium. In 1982, West German physicists produced and identified element 109, meitnerium. Lanthanum is a silvery white, malleable, ductile, and soft rare earth metal that oxidizes rapidly when exposed to air. And because neptunium-237 decays to a protactinium isotope with a much shorter half-life, scientists can determine when it was last separated and purified. Before zinc was identified as an element, it was used to make brass. Recognized as a new element in 1778, the first impure form of molybdenum was produced in 1782. Organic magnesium is important in both plant and animal life. In its natural form, it is a mixture of three isotopes. Attempts to discover dubnium started in 1967, but it wasnt officially identified until 1970. Rhodium is also used as a catalyst, in optical instruments, and for jewelry and decoration. Atomic Weight: (223) Melting Point: 27C Boiling Point: 677C Phase at STP: Solid Electronic Configuration: [Rn]7s1Common Oxidation States: +1 Number of Valence Electrons: 1. Joseph Priestley is generally credited with the discovery of oxygen. Ruthenium is a hard, white metal with four crystal modifications. Meitnerium is a transition metal and part of the platinum group. However, they can form stable complexes with ligands, such as chloride, sulfate, carbonate, and acetate. Plutonium is bright, silvery, and tarnishes in air. A silvery-white metal, aluminum is light, non-magnetic, and non-sparking; it is second among metals in malleability, and sixth in ductility. Little is known about this element, which has only been produced in minute amounts that decay rapidly. Atomic Weight: (268) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: *[Rn]5f146d37s2Common Oxidation States: N/A Number of Valence Electrons: 5. Helium is widely used in cryogenic and superconductivity research. Natural rhenium is a mixture of two stable isotopes; the other 26 are unstable. Thallium was discovered in 1861 and isolated in 1862. Tellurium is a p-type semiconductor, exhibits varying conductivity based on atom alignment, and gains conductivity when exposed to light. Natural tantalum has two isotopes; a total of twenty-five are known. Twelve radioactive isotopes also exist. This synthetic and radioactive element can only be produced in particle accelerators. It is a reddish metal that takes on a bright luster. It is found in argyrodite (a sulfide of germanium and silver), germanite, zinc ores, coal, and other minerals. First produced in 1950, californium acts like other lanthanide elements. Later that year, workers at Lawrence Berkeley and Livermore Laboratories also claimed to have created this element. Europium has a silvery-white metallic appearance and ignites in air between 150 and 180C. Atomic Weight: (285) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: *[Rn]5f146d107s2Common Oxidation States: N/A Number of Valence Electrons: N/A. Its most stable isotope has a half-life of less than 30 seconds. Atomic Weight: (293) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: *[Rn]5f146d107s27p4Common Oxidation States: N/A Number of Valence Electrons: N/A. More often found as the telluride of gold (calaverite) or combined with other metals, it can be found naturally. It is a heavy, reddish-brown liquid that produces a red vapor with a distinct and unpleasant odor. A little harder than gold, it is malleable and ductile, with high electrical and thermal conductivity and low contact resistance. Exposure to radium via inhalation, injection, or other body exposure can cause cancer and other illnesses. Which element is malleable at STP?(1) chlorine (2) copper A bluish-black and lustrous solid, iodine at ambient temperatures turns into a blue-violet gas with a distinct odor. This element is also used in electrolytic capacitors, vacuum furnace parts, chemical process equipment, nuclear reactors, aircraft and missile parts, and surgical appliances. Atomic Weight: (210) Melting Point: 302C Boiling Point: 337C Phase at STP: Solid Electronic Configuration: [Xe]4f145d106s26p5Number of Valence Electrons: 7. Sodium is never found free in nature. Shop Inorganic Sulfur Compounds Browse All Products Containing Sulfur , Atomic Weight: 32.07 Melting Point: 112.8C Boiling Point: 444.7C Phase at STP: Solid Electronic Configuration: [Ne]3s23p4Common Oxidation States: -2 Number of Valence Electrons: 6. The most reactive and electropositive metal, it is the lightest after lithium. When exposed to air, thalliums metallic luster develops a blue-gray tinge. Six other less-stable isotopes have been identified. Tin is also called stannum and has been known since ancient times. It is a versatile catalyst, and an alloy of ruthenium and molybdenum is reported to be superconductive at 10.6K. Natural thallium is a mixture of two isotopes; a total 25 isotopic forms exist. Rutherfordium was discovered in 1964 through separate research efforts in the Soviet Union and the United States. Bromine reacts with many elements, is readily soluble in water or carbon disulfide, and can be extracted from natural brines and seawater. Barium is found only in combination with other elements. Its gas is colorless, odorless, and tasteless. Natural yttrium contains one isotope, but nineteen unstable isotopes have also been characterized. The columns of the modern periodic table represent groups of elements and rows represent the periods. WebWhich element is malleable at STP? 2) Copper is malleable Atomic Weight: 4.0026 Melting Point: -272.2C Boiling Point: -268.9C Phase at STP: Gas Electronic Configuration: 1s2Common Oxidation States: 0 Number of Valence Electrons: 2. Although nitrogen gas is relatively inert, bacteria in soil can convert or fix nitrogen into a usable form for plants, where it helps to form proteins. Elemental fluorine and fluoride ions are highly toxic, with a characteristic pungent odor. Named after a town in Scotland and isolated in 1808, strontium was recognized in 1790. atomic numbers. Plutonium was discovered following the synthesis of neptunium-238. Hard and brittle, it becomes soft and ductile when alloyed, but its not a good conductor of heat or electricity. Theoretical calculations indicate that it may be significantly reactive, unlike the other noble gases in its group, and may actually be a solid. Lanthanides make up the 15 metallic chemical elements with atomic numbers 57 through 71. Natural neodymium is a mixture of seven stable isotopes, though 14 other radioactive isotopes exist. The oganesson atom is very unstable. It is considered a post-transition metal and is the heaviest chalcogen. They have fair electrical conductivity and brittle structures. It is present in the atmospheres of Earth and Mars and in gases from certain mineral springs. Semi-isolated in 1841, praseodymium was clearly identified as an element in 1885. Oxygen gas forms 21% of the atmosphere by volume and the element and its compounds make up nearly half the weight of the earth's crust. Answer to At STP, which element is malleable and a good conductor of electricity? Actinium was first discovered in 1899 and occurs naturally with uranium minerals. Atomic Weight: (251) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: [Rn]5f107s2Common Oxidation States: +3 Number of Valence Electrons: 2. Amorphous selenium is red (powder form) or black (vitreous form); the crystalline monoclinic version is deep red, and the stable crystalline hexagonal form is metallic gray. Chem Flashcards | Quizlet Its alloys are used in jewelry, and it can be formed into palladium leaf (a thickness of 1/250,000 inch). Fourteen isotopes of berkelium are known and have been synthesized. They are also used in the production of specialty glass. Nobelium behaves differently from other actinides and more like some alkaline earth metals. Naturally, argon comprises a mixture of three isotopes. But most often, the metal is used in alloys with other platinum group elements to make fountain pen tips, instrument pivots, phonograph needles, and electrical contacts. Atomic Weight: 1.008 Melting Point: -259.1C Boiling Point: -252.9C Phase at STP: Gas Electronic Configuration: 1s1Common Oxidation States: 1 Number of Valence Electrons: 1. Atomic Weight: (289) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: *[Rn]5f146d107s27p3Common Oxidation States: N/A Number of Valence Electrons: N/A. Copernicium was created in 1996 and has highly radioactive isotopes that do not occur in nature. Discovered spectroscopically in 1863 and isolated in 1864, indium is named for the indigo (blue) line in its spectrum. Coppers largest use is in the electrical industry, and its alloys, brass and bronze, are used in coins and gun metals. Phosphorus was discovered in 1669 and exists in four or more allotropic forms, including white (or yellow), red, and black (or violet). Shop Inorganic Praseodymium Compounds Browse All Products Containing Praseodymium , Atomic Weight: 140.9 Melting Point: 931C Boiling Point: 3017C Phase at STP: Solid Electronic Configuration: [Xe]4f36s2Common Oxidation States: +3 Number of Valence Electrons: 5. Web7 Which element is malleable at STP? The metal is dense, silver, reactive, and found in at least three allotropes. Some compounds are used in cosmetics and in medicine. It is found in niobite, niobite-tantalite, parochlore, and euxenite, and large deposits are associated with carbon-silicate rocks. This element is found mostly in bastnsite and monazite ores and has been identified spectroscopically in the sun and certain stars. Technetium metal is silvery-gray and tarnishes slowly in moist air. Tellurium improves copper and stainless-steel handling, decreases corrosion, and increases the strength and hardness of lead. Nihonium is a transactinide element that was officially named in 2016. Concentrated phosphoric acids are important to agriculture and farming as fertilizer components. In pyrotechnic flares, it provides a distinctive green color. Silver is stable in pure air and water and tarnishes with exposure to ozone, hydrogen sulfide, or air that contains sulfur. This element is extremely volatile and may exist as a gas at standard temperature and pressure. As the most malleable and ductile metal, gold is typically alloyed for strength. Cobalt compounds can be used to treat mineral deficiencies in animals. Einsteinium has no commercial uses, though it allows for fundamental studies of 5-f electrons. Shop Inorganic Dysprosium Compounds Browse All Products Containing Dysprosium , Atomic Weight: 162.5 Melting Point: 1412C Boiling Point: 2567C Phase at STP: Solid Electronic Configuration: [Xe]4f106s2Common Oxidation States: +3 Number of Valence Electrons: 2. Half-lives range from fractions of a millisecond to 58 minutes. In nature, chlorine is found only in a combined state, mostly as common salt (NaCl), carnallite, and sylvite. Its soft and malleable, stable at room temperature and in dry air, and rapidly oxidizes in moist air and elevated temperatures. Though assumed to be a highly reactive metal, francium does not exist in pure form. The metal is bluish white and lustrous, and hard and brittle even at high temperatures. Sulfur is also found in meteorites and occurs in natural gas and crude petroleum. WebWhich element is malleable and a good conductor of electricity at STP. Sodium terbium borate is used in solid-state devices. Its also a potential source of radiation for portable X-rays or of heat and energy for space probes and satellites. Cesium, an alkali metal, was discovered spectroscopically in 1860. Copper compounds are widely used in analytical chemistry testing. Carbon is found as carbon dioxide in the Earths atmosphere and dissolves in its natural waters. Its also hard and brittle and therefore hard to machine, form, or work. It remains liquid down to absolute zero but will readily solidify with increased pressure. Its superconductive properties have helped to make magnets that retain their superconductivity in the presence of strong magnetic fields. Its actually soft enough to cut with a knife and fairly stable in air. Element 115, moscovium, was first synthesized in 2003, recognized in 2015, and named in 2016. Nonmetals include hydrogen, carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, the halogens fluorine, chlorine, bromine, and iodine, and the noble gas elements. Transition metals are found in Groups 4 through 11of the periodic table; elements in Groups 3 and 12 are sometimes included. Xenon itself is safe, but its compounds are highly toxic because of their oxidizing abilities. It is commonly used in nuclear applications and for producing rust-resistant and high-speed tool steels. Its a white, crystalline, and brittle metal with a pinkish tinge. Shop Inorganic Cobalt Compounds Browse All Products Containing Cobalt , Atomic Weight: 58.93 Melting Point: 1495C Boiling Point: 2870C Phase at STP: Solid Electronic Configuration: [Ar]3d74s2Common Oxidation States: +2,3 Number of Valence Electrons: 9. Its presence in didymium glass helps provide the protective coloring in welders goggles. Gallium can be liquid near room temperature, making it useful in high-temperature thermometers. For your convenience, we also offer a printable periodic table of elements. Phosphorus is a waxy white solid and is colorless and transparent when pure. The pentahydrate form is used to make insulation fiberglass and sodium perborate bleach. Sodium is fairly abundant in the sun and stars, the fourth most abundant element on Earth, and the most commonly found alkali metal. This experience is for those who are in the healthcare field. The majority of helium in the U.S. is obtained from wells in Texas, Oklahoma, and Kansas. The first sample was produced in 1943. They are also used to produce special glasses, fine chinaware, and baking powder. It was originally called uranium-X and later shortened from proto-actinium in 1949 by IUPAC. The metal is silvery white and very hard, although softer and more ductile than tungsten. It reacts with water, imparts a crimson color to flame, and burns a dazzling white. All chromium compounds are colored and useful in a number of industrial applications. It has 29 known radioisotopes, the most common being 231Pa, a decay product of uranium-235 and an alpha-emitter with a half-life of 32,700 years. Scientific research is its only practical application. Similar to the metals, transition metals are malleable and ductile, conduct heat and electricity, and form positive ions. Because its radioactive, it must be handled appropriately. Thirty iodine isotopes are recognized; only one stable isotope is found in nature. Most isotopes undergo alpha decay or spontaneous fission. Potassium has 17 isotopes, including one radioactive form. Soft and ductile when annealed, its strength and hardness increase with cold working. Failure to appreciate cadmiums toxic properties may expose workers to danger. Shop Inorganic Platinum Compounds Browse Other Products Containing Platinum , Atomic Weight: 195.1 Melting Point: 1772C Boiling Point: 3827C Phase at STP: Solid Electronic Configuration: [Xe]4f145d96s1Common Oxidation States: +4,2 Number of Valence Electrons: 2. Osmium tetroxide has been used in fingerprint detection and tissue staining. Shop Inorganic Cadmium Compounds Browse All Products Containing Cadmium , Atomic Weight: 112.4 Melting Point: 320.9C Boiling Point: 765C Phase at STP: Solid Electronic Configuration: [Kr]4d105s2Common Oxidation States: +2 Number of Valence Electrons: 2. The spectral absorption bands of holmium were first noticed in 1878 and holmia, its yellow oxide, was prepared in 1911. Crystalline silicon is grayish with a metallic luster. Since then, it has been produced in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Shop Inorganic Indium Compounds Browse All Products Containing Indium , Atomic Weight: 114.8 Melting Point: 156.6C Boiling Point: 2080C Phase at STP: Solid Electronic Configuration: [Kr]4d105s25p1Common Oxidation States: +3 Number of Valence Electrons: 3. Malleability - Simple English Wikipedia, the free encyclopedia Atomic Weight: (258) Melting Point: N/A Boiling Point: N/A Phase at STP: N/A Electronic Configuration: [Rn]5f137s2Common Oxidation States: +3,2 Number of Valence Electrons: 2. Roentgenium is synthetic, highly radioactive, and does not occur in nature. It also forms an unstable hydrate. Discovered in 1782 and isolated in 1798, tellurium in its crystalline form is brittle and silvery-white with a metallic luster. It decays into thorium-227, radium-223, and also into radon, bismuth, polonium, lead isotopes, and other short-lived products. It is the fourth most abundant element in the earths crust by weight. Mendeleev predicted the existence of gallium (described as ekaaluminum), and it was discovered in 1875. Shop Inorganic Magnesium Compounds Browse All Products Containing Magnesium , Atomic Weight: 24.31 Melting Point: 649C Boiling Point: 1090C Phase at STP: Solid Electronic Configuration: [Ne]3s2Common Oxidation States: +2 Number of Valence Electrons: 2. Its alpha emissions excite the surrounding air to produce a blue aura. It was discovered in 1886. Erbium has a long history but was not isolated in reasonably pure form until 1934. It is radioactive and formed by merging carbon nuclei with californium. Chemical studies performed in 2007 and 2008 found that its unexpectedly volatile and may have properties similar to the noble gases. Mendelevium was first identified in 1955 and was named after the creator of the periodic table. Bismuth was discovered in 1753 and is sometimes confused with tin and lead. They are highly reactive and can be lethal in concentrated amounts. You may also use the color-coded periodic table chart with names, symbols, and atomic weights to find specific information you need for your work. Its allotrope ozone (O3) is formed when oxygen is subjected to an electrical discharge or ultraviolet light. First detected in 1890, europium was isolated in reasonably pure form in 1901. Astatine was first synthesized in 1940, is highly radioactive, and exists because of the radioactive decay of other elements.

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