Boron Element
Boron Element Boron is a naturally occurring element. In nature it is found combined with oxygen and other natural elements forming several different compounds called borates. Borates are widely distributed in nature, being present in the oceans, sedimentary rocks, coal, shale and some soils. The average concentration of boron in rocks varies from 5 mg/kg in basalts to 100 mg/kg in shales. In the ocean, the boron concentration is approximately 4.5 mg/liter. Symbol—B Atomic Number—5 Electronic Configuration – . Atomic Mass...
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Elements of Group IIIA There are five elements; Boron , Aluminium , Gallium , Indium and Thallium in group IIIA of the periodic table. Out of these, aluminium is the most abundant element. It is the third most abundant element found on earth crust. Since their general electronic configuration is , hence the elements belong to p-block elements. General Properties of Ill A Group Elements The elements of group III A exhibit similarity in the following properties: 1. Electronic configuration: They have three electrons...
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Mercury Element Mercury is the 80th element on the periodic table. It has 80 protons and has the chemical symbol Hg. Its atomic mass is 200.59 atomic mass units, melts at -30.87 degrees Celcius, and boils at 356.58. Elemental mercury is a silver-white, heavy, mobile, liquid metal at room temperature. It is the only metal on the periodic table that is found as a liquid at room temperature. Properties of mercury are that it contracts or expands evenly when heated or cooled, it remains a liquid over a wide range of temperatures, it does not...
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Zinc Element Zinc is a metallic chemical element found in reasonable abundance around the world. It is classified in the transition metals, along with nickel and mercury, among others. The metal is used in a variety of alloys and compounds which have a range of uses, from sunscreen to fine art. Living organisms also rely on zinc as a valuable nutritional trace element; many foods are excellent sources of zinc, including seeds and whole grains. Pure zinc metal is not toxic, but the element should be handled cautiously in some circumstances....
read moreChemistry of Cement
Cement It is an important building material used to bind other materials together. It is basically a mixture of lime stone and clay. When it is mixed with water and allowed to stand, it changes to a very hard mass like stone resembling with the famous Portland rock, a famous building stone of England and hence the name Portland cement was given by J.Aspidine in England. The approximate composition of cement is: Limestone provides CaO : 60 – 67 % Silica, : ...
read moreCalcium Element
Calcium Element Calcium is a metallic chemical element which appears in great abundance in numerous compounds in the Earth’s crust. Calcium is one of the most abundant minerals on Earth, in fact, and it is also a vital component of many living organisms, making calcium very important element of healthy nutrition. In addition to being important for healthy bodies, calcium also has a wide range of industrial uses, both in pure form and in a number of compounds. Although calcium is not as reactive as some alkaline earth metals, it...
read moreMagnesium Element
Magnesium Element Magnesium is an abundant metallic chemical element which has a number of industrial applications in addition to being vital for many living organisms, including humans. The atomic number of magnesium is 12, and the element is identified with the symbol Mg on the periodic table of elements. It is classified as an alkaline earth element, along with calcium and barium, among others. One of the more distinctive uses of magnesium is a source of illumination, since it burns bright white when ignited. Symbol-Mg Atomic...
read moreElements of group II
Elements of group II Group II of the periodic table consists of nine elements which are arranged in two subgroups A and B. Subgroup IIA comprises of Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). Radium is a radioactive element. The subgroup IIB comprises of Zinc (Zn), Cadmium (Cd) and Mercury (Hg). The oxides of Ca, Sr and Ba were known much earlier than the metals themselves and they were called alkaline earth metals since they were alkaline and existed on the earth. Now all the metals of...
read moreGold Element
Gold Element Gold is a metallic element with the atomic number 79 and the symbol Au. While the name gold comes from an Old English word meaning yellow, the symbol comes from the Latin aurum, which means “shining dawn.” On the periodic table of elements, gold is found in Group 11, along with silver, copper, and roentgenium, and in Period 6 between platinum and mercury. It is referred to as a “transition metal.” Gold is the most malleable, ductile metal. Described as yellow, gold is one of the so-called precious metals, along...
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Silver Element Symbol—Ag Atomic Number—47 Electronic Configuration – Atomic Mass—107.87 History and Occurrence: The metal silver was known to the ancients and was used as a coinage metal. It is found both in free and combined states. The principal ores of silver are: Argentite or silver glance, Ruby silver or pyrargyrite, Stephenite, Silver copper glance, Horn silver or chl-orargyrite, AgCl Argentiferrous lead, PbS (0.01 – 0.1% Ag). Extraction There are many processes for the extraction of silver...
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