The unique set of elements known as the alkaline earth metals are key components to humanity and life as we know it. Without them, many things that we both love and need would be gone. These remarkably diverse yet very similar elements that make up the alkaline earth metals family are: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra). Although this family is often overshadowed by the infamous alkali metals, you will soon learn how spectacular and brilliant these metals really are and their value to human life.
The alkaline earth metals are an interesting group of elements that have many properties and uses in this world. To learn about them will help one learn more about the world around them. These metals are soft, shiny, silvery, and very reactive; although they are not as reactive as the alkali metals, the group of elements right next to them. Speaking of groups, the alkaline earth metals are in the left side and in group 2 of the periodic table. When forming ions, the alkaline metals usually lose 2 electrons to get a positive 2 charge and become more stable. This allows them to take part in ionic bonds, mostly with the halogen family because halogens are negatively charged in their ionic form. Because the alkaline metals are positively charged, they attract and form ionic bonds.
The alkaline earth metals form many compounds that are commonly found in nature. The ionic bonds these metals form with the halogen family are called metal halides. These bonds are not solely ionic; they can be a covalent bond in the case of beryllium. Additionally, all of the alkaline metals, except beryllium, can react with water to form alkaline hydroxides, compounds containing the hydroxide ion. However,...
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Aluminum is the third most abundant element and most abundant metal in the Earth’s crust. Aluminum is never found in the free element state in nature. It
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
We thank the University of Oklahoma and the chemistry faculty for providing the space, instructions, and equipment for the development of this report and experiment.
David and John Free. (26 Nov 2006). MadSci Network: Chemistry. Retrieved on March 6, 2011, from http://www.madsci.org/posts/archives/2007-02/1171045656.Ch.r.html
The periodic table contains many different kinds of elements which are placed accordingly on the table. Potassium is in the alkali metals which is placed in group 1 of the table, alkali metals are among the most active metals. This element was found in 1801 by a man named Humphry Davy. Although the element does not have many uses in pure form as a compound it has many important purposes. Potassium is naturally in the human body if levels become too low or too high then it could cause problems for the individual. Low levels of potassium could cause muscle problems such as cramping and the muscle feeling weak, the person could have a hard time walking or holding onto objects. A serious concern would be the effects on the heart as it causes blood pressure to increase and abnormal heart rhythms.
Arsenic is quite common in nature, but is rare as native. It occurs free in nature, but is most often found in the minerals arsenopyrite, realgar and orpiment. There are three allotropes or polymorphic modifications of arsenic; gray, yellow, and black arsenic. Gray arsenic is the most common, the metallic ...
First, rhodium is one of the platinum group metals along with the other elements ruthenium, palladium, osmium, iridium, and platinum. It is considered a member of the transition metals family and is generally classified as a metal. On the periodic table it is located in group nine, period five (Thomas Jefferson NAF).
Lead is commonly referred to as Pb due to its chemical symbol on the periodic table (7). The Element as has an atomic number of 82 (7). From its atomic number, scientists can conclude that a natural element of lead contains a total of 82 protons, and 82 electrons (8). Lead also has an atomic mass of 207.2 (7). Being that the atomic mass is the number of protons plus the number of neutrons, scientists concludes that an atom of lead contains 125 neutrons along with the 82 protons (8). Lead is considered a poor metal on the periodic table. Lead is also in the p block of elements which means that its valence electrons will be in a p shell (8). Overall, the periodic table is a prime way to learn about the basics of
Simple metal hydrides contain hydrogen in their crystal structure. These simple metal hydrides include binary and intermetallic hydrides. Binary hydrides contain only one metal and generally represented as MHx, were M stands for metal. The intermetallic hydrides contain at least two metals in addition to the hydrogen and generally represented by the formula AmBnHx, where A, B are metals. These are further classified in to AB (CsCl structure), AB2 (Laves phase), A2B (AlB2 structure type), AB5 (CuC5 structure type). In these hydrides, metal A has strong affinity for hydrogen and B does not interact with hydrogen.
Group IIAB Iron meteorites have low concentrations of nickel compared to other iron groups. The structures vary from Hexahedrites to coarsest octahedrites. Hexahedrites have the lowest concentration of nickel in their structure. IIAB iron meteorites are thought to be highly reduced materials due to the absence of phosphates, low concentration of nickel and the occurrence of graphite [H]. Group IIIAB Iron meteorites are the largest group of Iron meteorites. Meteorites in this category have medium octahedrite structure (most common iron meteorite structure due to certain amount of Nickel concentration). IIIAB iron meteorites are thought to be oxidized materials due to the high abundance of phosphate [H]. Group IVA Iron meteorites are the third largest group and exhibits octahedrite structures. This group of meteorites has an unusually low ratio of Ir/Au. Apart from this the meteorites are not very volatile [H]. Group IVB iron...
In the Classifying Elements lab, the main purpose was to determine what characteristics would be used to divide the chemical elements into groups with similar properties. In order to place elements into groups two tests were held: test one was used to determine the physical properties of the substances such as being shiny or dull, and malleable or brittle. Test two was held to determine the chemical properties of the substances such as, the reaction when HCl or CuCl2 is added. After studying the two test results, it was certain that these substances could be placed in groups based upon the similar characteristics, such as physical and chemical properties.
Schreuder, Jolanda A. H.; Roelen, Corné A. M.; van Zweeden, Nely F.; Jongsma, Dianne; van der Klink, Jac J. L.; Groothoff, Johan W.
Radium is the 88th element on the periodic table, its family group is Alkaline Earth Metal. Radium is a chemical element with symbol Ra. Pure radium metal is bright white when freshly prepared, but blackens once it is exposure to air. Radium has been used to produce neutron sources, luminous paints, and medical radioisotopes. Marie Curie is known to be the mother of science, due to Marie several discoveries, Mrs. Curie made up most of the Earth metals in the periodic table. Marie discovered Radium and other key elements, which help us in our daily lives, especially taking x-rays. Marie was also the first person honored with two Nobel Prizes in both physics and chemistry.
Plontke, R. (2003, March 13). Chemnitz UT. TU Chemnitz: - Technische Universität Chemnitz. Retrieved April 1, 2014, from http://www.tu-chemnitz.de/en/