Berkelium is a member of the actinide and transuranium element series. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. asked Aug 7, 2017 in Chemistry by sforrest072 (127k points) Pure radium is silvery-white alkaline earth metal. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. The chemical symbol for Rhodium is Rh. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. The chemical symbol for Nickel is Ni. The chemical symbol for Chromium is Cr. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 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. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). A freshly exposed surface of pure copper has a reddish-orange color. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. The configuration of these electrons follows from the principles of quantum mechanics. Sodium is a soft, silvery-white, highly reactive metal. See the answer. The chemical symbol for Caesium is Cs. The electron configuration of an atom of any element is the of electrons per sublevel of the energy levels of an atom in its ground state. Given that the ionic product of $Ni(OH)_2$ is $2 \times 10^{-15}$. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Chemically, indium is similar to gallium and thallium. The chemical symbol for Zinc is Zn. The chemical symbol for Nobelium is No. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Platinum is one of the least reactive metals. The chemical symbol for Xenon is Xe. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. The chemical symbol for Gold is Au. asked Dec 17, 2018 in Structure of Atom by pinky (74.2k points) structure of atom; neet; 0 votes. Actual configuration: 1s 2, 2s 2 2p 6, 3s 2 3p 6, 4s 1 3d 5. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. The chemical symbol for Rubidium is Rb. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. The chemical symbol for Radon is Rn. Chromium and copper have electron configurations [Ar] 3d 5 4s 1 and [Ar] 3d 10 4s 1 respectively, i.e. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. The chemical symbol for Promethium is Pm. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. The chemical symbol for Dysprosium is Dy. Electron configuration of Copper is [Ar] 3d10 4s1. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. 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 Samarium is Sm. 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. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. It is a noble metal and a member of the platinum group. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Electronic configuration of copper and copper ions Note that while filling electrons in various orbitals they are filled according to the three laws – Aufbau, Pauli and Hund’s. The first two columns on the left side of the periodic table are where the s subshells are being occupied. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. The chemical symbol for Osmium is Os. Pure germanium is a semiconductor with an appearance similar to elemental silicon. However the actual electronic configuration of Cu (using [Ar] as a short cut) is [Ar], 4s*1, 3d*10. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Uranium is a silvery-white metal in the actinide series of the periodic table. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Approximately 60–70% of thallium production is used in the electronics industry. 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