The Uses and Significance of Group Two Compounds
The group two elements consist of Beryllium, Magnesium, Calcium,
Strontium, Barium and Radium. These are known as the ‘Group Two
elements’ because of their unique electron division. Each one of these
elements, consists of two outer shell electrons. Because of the lack
of outer electrons, these elements are highly reactive. Group two
electrons have a positive Two charge or +ve. The Group 2 elements are
all metals with a shiny, silvery-white colour. The alkaline earth
metals are high in the reactivity series of metals, but not as high as
the alkali metals of Group 1. These elements are all found in the
Earth’s crust, but not in the elemental form as they are so reactive.
Instead, they are widely distributed in rock structures. The metals of
Group 2 are harder and denser than sodium and potassium, and have
higher melting points. The chemical properties of Group 2 elements are
dominated by the strong reducing power of the metals. The elements
become increasingly electropositive on descending the Group. The last
element in Group 2, Radium, is not yet definite in terms of melting
points or density due to its very strong radioactivity emission.
Beryllium is used for X-ray windows (Beryllium transmits X-rays 17
times better than aluminium), as a 2% alloy with nickel for springs,
electrodes and non-sparking tools. Beryllium (2%) alloyed with copper
gives a hard strong alloy with high resistance to wear used in
gyroscopes, computer parts, and instruments. Magnesium is used in
flares and pyrotechnics, including incendiary bombs. It was used in
flash photography and is lighter than aluminium. It ...
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...er, as we rarely use its
purified version. Due to the participation of Magnesium, Carbon
dioxide reacts with water to form carbonic acid which at ordinary
environmental pH exists mostly as bicarbonate ions. Microscopic marine
organisms take this up as carbonates to form calcite skeletons which,
over millions of years, have built up lots of limestone deposits.
Ground waters, made slightly acidic by CO2 (both that absorbed from
the air and from soil bacteria) dissolve the limestone, therefore
enduing up with calcium and bicarbonate ions and becoming "hard”. All
of the above only forms a very small minority of the potential of
group two elements, which gives us an indication of the importance and
significance that they all posses to one and other and most
importantly, to us and the daily industrial procedures carried out.
The goal of this lab is to exemplify a standard method for making alkyne groups in two main steps: adding bromine to alkene groups, and followed by heating the product with a strong base to eliminate H and Br from C. Then, in order to purify the product obtained, recrystallization method is used with ethanol and water. Lastly, the melting point and IR spectrum are used to determine the purity of diphenylacetylene.
Although some of the elements have been known for thousands of years, our understanding of many elements is still young. Mendeleev’s first Periodic Table contained only 63 elements, and about that many were discovered in the following 100 years. Just like countries, emperors, philosophers, and cities, elements have histories, too.“The Disappearing spoon” by Sam Kean, is a detailed history of the elements on the Periodic Table. Kean does a important job of telling every single element’s journey throughout the history of mankind: from the earliest times, when chemistry was intermingled with alchemy, to these days of modern chemistry. For example: Thallium is considered the deadliest element, pretending to be potassium to gain entry into our cells where it then breaks amino acid bonds within proteins. The CIA once developed a plan to poison Fidel Castro by dosing his socks with thallium-tainted
Lithium (Li), the third element on the periodic table, has a soft texture and a silver-white color. This element has an atomic number of three, and is located on the periodic table in the second period of the first group. In addition to being the first alkali metal on the periodic table, lithium is also the lightest metal; its weight is about 6.941 atomic mass units (AMU). Because it is a metal, lithium is mainly used in ionic bonds. Its common compounds include lithium hydride (LiH), lithium nitride (Li3N), lithium carbonate (Li2CO3), lithium hydroxide (LiOH), and lithium fluoride (LiF). Lithium is the thirty-third most abundant element and makes up a very small portion of the Earth’s crust. However, due to its high reactivity, it does not naturally occur in its pure form.
We have to emphasize the importance of memorizing certain names and formulas and some prefixes and suffixes that are used in building a system of nomenclature. From there on, it is a matter of applying the system to different names and formulas you meet. The summary all the ideas that will be presented in this essay help you to learn the nomenclature system.
Tin was the first man made element. Malaysia and South Africa are the main exporter to USA market. Electro microscopes, one of the best technology of our world that to know each small amount of atoms easily with 10.000 times of atoms images, Periodic table is one of the source of element of the 118 elements with their symbol and protons and electrons numbers. In the periodic table more than 70 elements are metallic. One of the hunting of the elements film secrets was made, you to get more understanding of correlation between the elements and life. To be sure, chemistry of life, rare earth elements, and radioactivity are the main components of the real life. Carbon (C), Hydrogen (H), Nitrogen (N), Oxygen (O), Phosphorus (P), and Sulfur (S) area the six elements of life, CHNOPS are also the basic elements of all living things. Phosphorus is the first element isolated from living
Aluminum is a lightweight, silvery metal. The atomic weight of aluminum is 26.9815; the element melts at 660° C (1220° F), boils at 2467° C (4473° F), and has a specific gravity of 2.7. Aluminum is a strongly electropositive metal and extremely reactive. In contact with air, aluminum rapidly becomes covered with a tough, transparent layer of aluminum oxide that resists further corrosive action. For this reason, materials made of aluminum do not tarnish or rust. The metal reduces many other metallic compounds to their base metals. For example, when thermite (a mixture of powdered iron oxide and aluminum) is heated, the aluminum rapidly removes the oxygen from the iron; the heat of the reaction is sufficient to melt the iron. This phenomenon is used in the thermite process for welding iron .
The Beryllium element, an alkaline earth metal which belongs to group II of the periodic table, was first discovered in 1798 by L.M. Vauquelin. Vauquelin,a French chemist, was doing work with aluminum and noticed a white powder that was nothing like that of aluminum or any of its derivatives. Vauquelin named this mystery powder, gluinium because of its sweet taste was like that of glucose. In 1828, Wohler, a German metallurgist reduced it to its metallic form and renamed it beryllium.(figure 2)
When I look at the word oppression, images come to mind; images like being inferior and downtrodden. The word “oppression” can and is a powerful weapon. Let’s look at the meaning of the word, “the exercise of authority or power in a burdensome, cruel or unjust manner, the state of being oppressed.” (dictionary.com, 2013). During South Africa’s fight for freedom from the cruelty of apartheid, Steve Biko made many speeches to help raise the consciousness of his black brothers and in one of his speeches, he made this statement, the most important weapon in the hands of the oppressor is the MIND of the oppressed.” (Boddy.Evans, 2013). This is a powerful statement and it makes the meaning of “oppression” very clear. Words like oppression and discrimination are powerful and painful. They are tools that have been used in the past and are still in use today. You can be oppressed and discriminated by words as well as action. There have been many times when certain groups have been oppressed and treated with unbelievable cruelty. I am referring to the enslavement of the African people and to the mass killing and displacement of the Native American Indians. During that time, blacks were captured from Africa and brought over to America to do hard labor. They were treated as property, shackled like animals and they endured unbelievable cruelty. This is what I would call the ultimate meaning of oppression. There rights and dignity as a human being was taken away from them. Slavery lasted in this country for over 300 years. That time was during slavery in America. (Schiller, 2011). The American Indians were beaten almost to annihilation just because the land that they were on was coveted by the American settlers. (“North American Indians, 2013). We live in a society that has thrived on discrimination
Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide.
The role of women in ancient Greece when put side by side with the role of men is relatively insignificant, yet in Greek tragedies such as Agamemnon, Oedipus the King and Orestes, the women are often given the title of “main character,” thus revealing the ideal standards of how women are treated and thought of in society at the time. Many, if not most of the popular Greek tragedies have several female roles that aren’t simple and irrelevant but rather, they are complex and thoroughly thought out to be involved well into the play. Usually, the feminine characters take up the role as the heroine, the victim or the villain. Sometimes, to make the play extra dramatic, the playwrights will incorporate all three of the personalities into one female role. A well known woman who accomplished that was Clytemnestra in Aeschylus’ Agamemnon who threw many twists and turns into the plot.
Carbon is one of the basic elements of matter (Bush 1230-1231). The name carbon comes from the Latin word "carbo" meaning charcoal.Carbon is the sixth most abundant element (Gangson). More than 1,000,000 compounds are made from carbon(Carbon (C)). "The Element Carbon is defined as a naturally abundant non-metallic element that occurs in many inorganic and in all organic compounds, exists freely as graphite and diamond and as a constituent of coal, limestone, and petroleum, and is capable of chemical self-bonding to form an enormous number of chemically, biologically, and commercially important molecules." Carbon is used in diamonds, petroleum oil, radiocarbon dating, smoke detectors, kerosine, gasoline, carbon fiber. (Alcin).
Aluminum is an element in the boron group with a symbol of Al, and an atomic number of 13. Aluminum is a very soft metal when pure but becomes strong and hard when alloyed, a malleable metal with a silvery gray color. Aluminum is a very reactive element so it is found in nature combined with other elements. Aluminum resists corrosion by the formation of a self-protecting oxide coating. Aluminum is the third most abundant element in the Earth’s crust, following oxygen and silicon. It makes up approximately 8% by weight of the Earth’s surface. Although this is evident, it is also apparent that aluminum is never found by itself in nature. All of the earth’s aluminum has combined with other elements to form compounds and in order to create new aluminum products; it has to be taken out of that specific compound. Aluminum does not rust like other elements, therefore it always remains strong and shiny, which means reused aluminum is almost identical to a brand new piece of metal. An electrochemical process creates aluminum. An electrochemical process is “the direct process end use in which electricity is used to cause a chemical transformation” ( E.I.A. Government). Major uses of electrochemical processes occur in the aluminum industry in which alumina is reduced to molten aluminum metal and oxygen, where than the aluminum can be used into making several different materials. Electrochemical processes, although very useful, can have serious environmental consequences. To help reduce the consequences that the production of aluminum creates, the idea of aluminum recycling comes into play.
The Periodic Table of Elements is commonly used today when studying elements. This table’s history begins in ancient times when Greek scientists first started discovering different elements. Over the years, many different forms of the periodic table have been made which set the basis for the modern table we use today. This table includes over 100 elements and are arranged by groups and periods. Groups being vertical columns and periods being horizontal columns. With all of the research conducted over the years and the organization of this table, it is easy to use when needed.
In year 2006 the company named Primo Benzina started operations with its two outlets located in Stuttgart in Germany and two outlets in Basel Switzerland. The company was started as a retail chain of petrol stations with differentiation in product line with its competitors. The company was offering petrol, snacks, restaurant meals, and high-quality service in central Europe. It grew swiftly from 4 outlets and sales of 2.4 million Euros in 2006 to 24 outlets and sales of 38.1 million Euros in 2009.