Another source of the metal is sperrylite (PtAs2). It is a soft, silvery-white alkali metal. The energy level is the period (minus one for the d orbitals and minus two for the f orbitals). Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. The chemical symbol for Arsenic is As. Elemental sulfur is a bright yellow crystalline solid at room temperature. The chemical symbol for Bismuth is Bi. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. 1s 2 2s 2 2p 4. Platinum does not dissolve in hydrochloric or nitric acid but will dissolve when the two acids are mixed to form aqua regia. The chemical symbol for Selenium is Se. Tags: Question 5 . Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The chemical symbol for Germanium is Ge. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. The chemical symbol for Neodymium is Nd. Since 1s can only hold two electrons the next 2 electrons for F go in the 2s orbital. Thulium is the thirteenth and third-last element in the lanthanide series. Ulloa 1735 (in South America), Wood in 1741, Julius Scaliger in 1735 (Italy) can all make claims to this honor. "Lange's Handbook of Chemistry." … Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. The chemical symbol for Sodium is Na. Check whether 6^n can end with the digit 0 for any natural number n. Explain why 7 × 11 × 13 + 13 and 7 × 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite numbers; Prove that √5 is irrational; Prove that 3 … The chemical symbol for Antimony is Sb. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Cerium is the second element in the lanthanide series. The chemical symbol for Xenon is Xe. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. 113Cd has specific absorption cross-section. 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 ground state electron configuration of ground state gaseous neutral platinum is [Xe].4f 14.5d 9.6s … Thulium is an easily workable metal with a bright silvery-gray luster. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. The chemical symbol for Erbium is Er. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Platinum atoms have 78 electrons and the shell structure is 2.8.18.32.17.1. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. The chemical symbol for Barium is Ba. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The chemical symbol for Tantalum is Ta. The chemical symbol for Terbium is Tb. Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. is a rare earth element with a metallic silver luster. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. The chemical symbol for Astatine is At. This fact has key implications for the building up of the periodic table of elements. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. I'll go over how to write the electron configuration both the full electron configuration and condensed/abbreviated noble gas electron configuration. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Platinum. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Use the element blocks of the periodic table to find the highest electron orbital. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. The noble gas shorthand is used to summarize the electron configuration of an element while providing the most relevant information about the valence electrons of that element. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Iron is a metal in the first transition series. Thorium is moderately hard, malleable, and has a high melting point. Electron configuration: [Xe] 4f 14 5d 9 6s 1 The electron configuration of a "Ca"^(2+)" ion is "1s"^2"2s"^2"2p"^6"3s"^2"3p"^6". In the periodic table, the elements are listed in order of increasing atomic number Z. The chemical symbol for Praseodymium is Pr. Electron configuration of Platinum is [Xe] 4f14 5d9 6s1. Electron configuration of Platinum is [Xe] 4f14 5d9 6s1. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. al. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Since 1s can only hold two electrons the next 2 electrons for N goes in the 2s orbital. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. There are many interesting facts about this element. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. So, if we were to add all the electrons from the above electron configuration, 2+2+6+2+6+2+10+6+2+10+6+2+14+10+3=83. Lawrencium is the final member of the actinide series. The chemical symbol for Cadmium is Cd. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The information contained in this website is for general information purposes only. Francium is a highly radioactive metal that decays into astatine, radium, and radon. 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