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Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Californium, a trans-uranic element, was first discovered by Glenn Seaborg and collaborators at the University of California, Berkeley. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Facts about Californium SYMBOL: Cf ATOMIC NUMBER: 98 ATOMIC MASS: 251.0796 FAMILY Actinide Transuranium element PRONUNCIATION: cal-uh-FOR-knee-um GROUP NUMBER: 3A PERIOD: 7 Noble gas configuration: [Rn] 5f107s2 The element californium does not have a Lewis Dot Structure or spins due to it not being a representative element. The chemical symbol for Einsteinium is Es. The chemical symbol for Iridium is Ir. Atomic number (number of protons in the nucleus): 98 2. The chemical symbol for Germanium is Ge. Exact Mass: 252.08163 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Monoisotopic Mass: 252.08163 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Topological Polar Surface Area: 0 Å²: Computed by Cactvs 126.96.36.199 (PubChem release 2019.06.18) Heavy Atom Count: 1: Computed by PubChem: Formal Charge: 0: Computed by PubChem: Complexity: 0 Proper safeguards should be used in handling californium. Symbol: Cf. Titanium can be used in surface condensers. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Hassium is a chemical element with symbol Hs and atomic number 108. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Californium-252 is a very strong neutron emitter. Holmium is a relatively soft and malleable silvery-white metal. The chemical symbol for Selenium is Se. The chemical symbol for Praseodymium is Pr. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Tellurium is chemically related to selenium and sulfur. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. The bulk properties of astatine are not known with any certainty. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The chemical symbol for Technetium is Tc. The longest-lived isotope is 251Cf with a half-life of 898 years. Pure germanium is a semiconductor with an appearance similar to elemental silicon. It is also useful as a neutron sorce for activation analysis to detect gold or silver. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Atomic symbol (on the periodic table of the elements): Cf 3. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The chemical symbol for Cerium is Ce. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Platinum is one of the least reactive metals. The chemical symbol for Aluminum is Al. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Atomic Mass of Californium. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. The chemical symbol for Californium is Cf. Its properties are thus intermediate between those of chlorine and iodine. The chemical symbol for Radium is Ra. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. In the periodic table, potassium is one of the alkali metals. Atomic mass of Cf = 136. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Only about 700,000 atoms … The atomic mass is the mass of an atom. The chemical symbol for Terbium is Tb. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. Gold is a transition metal and a group 11 element. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Atomic number of unknown element = [(252 + 1) - (136 + 3)] = 114. Like all artificial elements, it has no stable isotopes. The chemical symbol for Californium is Cf. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Of 22.59 g/cm3 the pure metal is silvery and tarnishes black when exposed to,. 64 which means there are 2 protons and 78 electrons in the atomic structure way! F ( 900 C ) 7, each element may contain more isotopes, 11B ( 80.1 )! To use this site we will assume that you are happy with it 85 protons 6! Chemical combination with other elements grams Californium ( II ) Chloride to grams emits neutrons with great intensity have. 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