Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). The chemical symbol for Iridium is Ir. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus. For uranium atom, the Van der Waals radius is about 186 pm = 1.86 ×10−10m. Titanium is a lustrous transition metal with a silver color, low density, and high strength. It is the heaviest essential mineral nutrient. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. However, there are interesting facts about Chlorine that most don't know about. Klaus Theopold + 4 others. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. G/cc is a measure of density. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. It is shipped in steel cylinders under its own vapor pressure of about 85 psig @ 70° F. Common uses for Chlorine are water purification, bleaching and the manufacture of various chemicals. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. The chemical symbol for Tantalum is Ta. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. L. E. Gant. Tellurium is far more common in the universe as a whole than on Earth. The chemical symbol for Molybdenum is Mo. 8 years ago. The unit of measure for mass is the atomic mass unit (amu). for standard conditions. The chemical symbol for Lawrencium is Lr. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. The atomic mass is the mass of an atom. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. It is one of the least reactive chemical elements and is solid under standard conditions. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. The chemical symbol for Antimony is Sb. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Relevance. 3 Answers. The chemical symbol for Thorium is Th. Neodymium is a soft silvery metal that tarnishes in air. Typical densities of various substances at atmospheric pressure. Density of Polyvinyl chloride in a few select units of density measurement: Density of Polyvinyl chloride g cm3 = 1.3 g/cm³; Density of Polyvinyl chloride g ml = 1.3 g/ml; Density of Polyvinyl chloride g mm3 = 0.0013 g/mm³; Density of Polyvinyl chloride kg m3 = 1 300 kg/m³ Specific Properties: Molecular weight 70.914 Boiling point -33.6°C Vapour pressure at 20°C 6860 mmHg Density in gaseous state at 0°C and 760 mm Hg 3.214 g/cm3 Density in liquid state at 0°C and 3.65 atm 1.47 g… Astatine is the rarest naturally occurring element on the Earth’s crust. The chemical symbol for Calcium is Ca. Therefore, the effective nuclear charge towards the outermost electrons increases, drawing the outermost electrons closer. It is fairly soft and slowly tarnishes in air. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Thanks in advance for your help. Density is defined as the mass per unit volume. Hassium is a chemical element with symbol Hs and atomic number 108. Xenon: Density at 0° Celsius. The chemical symbol for Platinum is Pt. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Radon: Density at 0° Celsius. This variation is typically small for solids and liquids but much greater for gases. Chlorine TDS. The chemical symbol for Fermium is Fm. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. Everything has mass and volume, and therefore density. The chemical symbol for Caesium is Cs. On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right). Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Carbon is one of the few elements known since antiquity. Lawrencium is the final member of the actinide series. Lv 4. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The densest material found on earth is the metal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The chemical symbol for Ruthenium is Ru. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Chemical compound of the family of halogens, chlorine is a yellowish-green gas with suffocating smell very unpleasant and it is extremely toxic. The chemical symbol for Polonium is Po. Chlorine has a wide range of applications. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Gelson Luz is a Mechanical Engineer, expert in welding and passionate about materials. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. The chemical symbol for Barium is Ba. 1 Answer. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The chemical symbol for Plutonium is Pu. Iron is a metal in the first transition series. James . Definitions and convertion calculators. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. The chemical symbol for Bismuth is Bi. The Standard English unit is pounds mass per cubic foot (lbm/ft3). Holmium is a relatively soft and malleable silvery-white metal. Pure radium is silvery-white alkaline earth metal. As a result of this expansion, the density of most materials decreases. The chemical symbol for Aluminum is Al. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. The chemical symbol for Indium is In. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Therefore the space in an atom (between electrons and an atomic nucleus) is not empty, but it is filled by a probability density function of electrons (usually known as  “electron cloud“). Thallium is a soft gray post-transition metal is not found free in nature. Density - ρ-kg/m3 lb m/ft3 ... Chlorine Cl 2 70.906 2.9941) 0.18691) Coke Oven Gas 0.0342) Combustion products 1.11 2)0.069 Cyclohexane 84.16 Hexane 86.17 Hydrogen H 2 2.016 0.08992) 0.00562) Hydrochloric Acid 36.47 Hydrogen Chloride HCl 36.5 1.5281) 0.09541) Hydrogen Sulfide H 2S 34.076 1.4341) 0.08951) Methane CH 4 16.043 0.6681) 0.717 2) 0.04171) 0.0447 Digester Gas (Sewage or … The chemical symbol for Beryllium is Be. Answer Save. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. But what is the density of an atom of Na? H315: Provoque une irritation cutanée. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. The chemical symbol for Samarium is Sm. The chemical symbol for Sodium is Na. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. The chemical symbol for Oxygen is O. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. The chemical symbol for Lithium is Li. The atomic radii decrease across the periodic table because as the atomic number increases, the number of protons increases across the period, but the extra electrons are only added to the same quantum shell. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). The chemical symbol for Xenon is Xe. The chemical symbol for Curium is Cm. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Typical densities of various substances are at atmospheric pressure. Composition of CHLORINE: Density (g/cm3) = 2.99473E-03 Mean Excitation Energy (eV) = 174.000000 COMPOSITION: Z = Atomic number WT = Fraction by weight Z WT 17 1.000000 Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Favorite Answer. A freshly exposed surface of pure copper has a reddish-orange color. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. The chemical symbol for Gadolinium is Gd. Einsteinium is the seventh transuranic element, and an actinide. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. The chemical symbol for Iron is Fe. 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