Bohrium (Bh) - Atomic Number 107. Bohrium (Bh) is a radioactive metal that has the atomic number 107 in the periodic table, its appearance is not fully known due to the minuscule amounts produced of it. It is a Transition metal in Group 7. It has the symbol Bh. Bohrium is a synthetic chemical element with the symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. As a synthetic element, it can be created in a laboratory but is not found in nature. Atomic Number: 107: Atomic Radius: empirical: 128 pm (predicted) 2: Atomic Symbol: Bh: Melting Point:-Atomic Weight: 270: Boiling Point:-Electron Configuration. 107 is also: The atomic number of bohrium. The emergency telephone number in Argentina and Cape Town. The telephone of the police in Hungary. A common designation for the fair use exception in copyright law (from 17 U.S.C. 107) Peugeot 107 model of car. This podcast is about one of these elements, number 107 in the periodic table, called bohrium. Transuranium elements are essentially made by slamming atoms of different elements into each other at very high speeds in the hope that such collisions will allow nuclei to fuse together to form atoms of a.
|For centuries many countries used silver for coinage. The United States monetary system was based on the silver standard from 1933 until 1968.|
|Atomic Number:||47||Atomic Radius:||172 pm (Van der Waals)|
|Atomic Symbol:||Ag||Melting Point:||961.78 °C|
|Atomic Weight:||107.9||Boiling Point:||2162 °C|
|Electron Configuration:||[Kr]5s14d10||Oxidation States:||−2, −1, 1, 2, 3 (an amphoteric oxide)|
The Latin word for silver is argentum. Silver has been known since ancient times. It is mentioned in Genesis. Slag dumps in Asia Minor and on islands in the Aegean Sea indicate that man learned to separate silver from lead as early as 3000 B.C.
Silver occurs natively and in ores such as argentite (Ag2S) and horn silver (AgCl); lead, lead-zinc, copper, gold, and copper-nickel ores are principal sources. Mexico, Canada, Peru, and the U.S. are the principal silver producers in the western hemisphere.
Silver is also recovered during electrolytic refining of copper. Commercial fine silver contains at least 99.9% silver. Purities of 99.999+% are available commercially.
Pure silver has a brilliant white metallic luster. It is a little harder than gold and is very ductile and malleable, being exceeded only by gold and perhaps palladium. Pure silver has the highest electrical and thermal conductivity of all metals, and possesses the lowest contact resistance. It is stable in pure air and water, but tarnishes when exposed to ozone, hydrogen sulfide, or air containing sulfur. The alloys of silver are important.
Atomic Number 107 Unnilseptium
Sterling silver is used for jewelry, silverware, etc. where appearance is paramount. This alloy contains 92.5% silver, the remainder being copper or some other metal. Silver is of the utmost importance in photography, about 30% of the U.S. industrial consumption going into this application. It is used for dental alloys. Silver is used in making solder and brazing alloys, electrical contacts, and high capacity silver-zinc and silver-cadmium batteries. Silver paints are used for making printed circuits. It is used in mirror production and may be deposited on glass or metals by chemical deposition, electrode position, or by evaporation. When freshly deposited, it is the best reflector of visible light known, but is rapidly tarnished and loses much of its reflectance. It is a poor reflector of ultraviolet. Silver fulminate, a powerful explosive, is sometimes formed during the silvering process. Silver iodide is used in seeding clouds to produce rain. Silver chloride has interesting optical properties as it can be made transparent; it also is a cement for glass. Silver nitrate, or lunar caustic, the most important silver compound, is used extensively in photography. Silver for centuries has been used traditionally for coinage by many countries of the world. In recent times, however, consumption of silver has greatly exceeded the output.
While silver itself is not considered to be toxic, most of its salts are poisonous. Exposure to silver (metal and soluble compounds, as Ag) in air should not exceed 0.01 mg/m3, (8-hour time-weighted average - 40 hour week). Silver compounds can be absorbed in the circulatory system and reduced silver deposited in the various tissues of the body. A condition, known as argyria, results with a grayish pigmentation of the skin and mucous membranes. Silver has germicidal effects and kills many lower organisms effectively without harm to higher animals.
Einhell strimmer spool. Akanksha C. answered this
From atomic number of an element, we can write its electronic configuration.
Depending upon the number of electrons present in valence shell, we can come to know about group number of the element. For example, Atomic number of 107. So its electronic configuration will be: [Rn] 5f146d57s2
Number of valence electron is 7 so its group number is 7.
Principal energy level, in which valence electrons are filled indicates the period number of the element. For example, atomic number of element is 107 so its electronic configuration will be:
Atomic Number 107 Iupac Name
Here valence electrons are present in shell having value n=7
Element With Atomic Number 107 1
So its period number is 7
Hope it helps!