# group 2 periodic table

The name "Alkaline" is from its slight solubility to water, while "Earth" is derived from its inability to decompose when exposed to heat. Radium compounds are extremely rare in nature because of its short half-life and intense radioactivity. Have questions or comments? By – Sameer Sharma Groups 3-12 are termed d-block elements. The three most abundant: 223Ra, 224Ra and 226Ra decay by emitting alpha particles, whereas 228Ra decays emitting a beta particle. In its elemental form, magnesium is used for structural purposes in car engines, pencil sharpeners, and many electronic devices such as laptops and cell phones. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. There are two different numbering systems that are commonly used to designate groups and you should be familiar with both. $\endgroup$ – bobthechemist Sep 27 '13 at 20:04 $\begingroup$ @bobthechemist no , i mean that the oxidation states +1 and + 2 are stable for the alkali and the alkali earth metals respectively . Radium is radioactive and is not considered in this section. Beryllium has a strong affinity for oxygen at high temperatures, and thus it is extremely difficult to extract from ores. The reactions of the alkaline earth metals differ from those of the Group 1 metals. It is the 8th most abundant element in the Earth's crust, constituting 2% by mass. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. Alkaline-earth metals: The alkaline-earth metals make up Group 2 of the periodic table, from beryllium (Be) through radium (Ra). Abhishek Bansal The following diagram shows the location of these metals in the Periodic Table: The table below gives a detailed account of the descriptive chemistry of each of the individual elements. This beryllium is not commercially available as it cannot be economically mass produced. Groups are numbered from 1 to 18. Now, when one atom of X combines with two atoms of Cl, an ionic compound of the formula XCl 2 is formed. Because of its high melting point, $$BeO$$ is a good heat conductor in electrical insulators. We know that chlorine has 7 valence electrons. Petrucci, Ralph H, William Harwood, and F. Herring. Calcium (Ca) is in group 2, for it contains two valence electrons. The noble gases are very unreactive. Group 2 contains soft, silver metals that are less metallic in character than the Group 1 elements. Strontium metal is a slightly softer than calcium and has a melting point of 1042 K. In it's pure form, Strontium is used in alloys. Created: Aug 18, 2015 | Updated: Jun 29, 2017. True or False: Alkaline earth metals do not react vigorously with water. The elements in the group include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). about group 2 of periodic table its very much helpful for all. They are called s-block elements because their highest energy electrons appear in the s subshell. The three stable isotopes of magnesium are 24Mg, 25Mg, and 26Mg. This isotope has a relatively long half-life of 1.51 million years, and is useful in examining soil erosion and formation, as well as the age of ice cores. The element was originally named glucinum, and it was first isolated in 1828 by Antoine Bussy and Friedrich Wohler. Maguire, Michael E. "Alkaline Earth Metals.". Calcium was isolated in 1808 by Sir Humphry Davy by the electrolysis of lime and mercuric oxide. Achhar Singh. Most radium isotopes have relatively short half-lives. 2.11 Group II elements and their compounds An element X belongs to 3rd period and group 2 of the periodic table. Which Group 2 element has a scarlet flame color? Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. See our Privacy Policy and User Agreement for details. The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure. $Ca_{(s)} + H_{2\, (g)} \rightarrow CaH_{2\, (s)}$, $Sr_{(s)} + O_{2 (g)} \rightarrow SrO_{2\, (s)}$, $3Mg_{(s)} + N_{(g)} \rightarrow Mg_3N_{2 (s)}$, $Mg_{(s)} + Cl_{2(g)} \rightarrow MgCl_{2(s)}$, $Ba_{(s)} + 2H_2O_{(l)} \rightarrow Ba(OH)_{2(aq)} + H_{2(g)}$. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Strontium was first discovered in 1790 by Adair Crawford in Scotland and is named after the village it was discovered in, Strontian. A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. Previously, it had only been found in a mixture with barium chloride, but as $$RaCl_2$$ appeared to be less soluble than barium chloride, the mixture could continually be treated to form a precipitate. Alternative names for Group 2 are: In 1898, Paul Lebeau was able to produce the first pure samples of Beryllium by electrolyzing molten beryllium fluoride and sodium fluoride. In nature, it is only found in combination with other elements as it is extremely reactive. Because beryllium is relatively light and has a wide temperature range, it has many mechanical uses. PERIODIC TABLE GROUP 2 MENU . The elements in the group include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Fully descriptive writeups. Which Group 2 element is the most radioactive? Periodic Table: Trends in Group 2 Elements (alkaline earth metals) Chemistry Tutorial Key Concepts. 1 answer. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. There are 6 elements in group 2 in … The second vertical column from the left in the periodic table is referred to as Group 2. 1. Beryllium is a monoisotopic element—it has only one stable isotope, 9Be. Now customize the name of a clipboard to store your clips. Please be aware that resources have been published on the website in the form that they were originally supplied. No public clipboards found for this slide. As a precaution, when burning or lighting pure magnesium, UV-protected goggles should be worn, as the bright white light produced can permanently damage the retina. It is also an amphoteric oxide, meaning it can react with both strong acids and bases. You'll find more specific groups, like transition metals, rare earths , alkali metals, alkaline earth, halogens, and noble gasses. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). In nature, it is only found in combination with other elements. Why is the term alkaline used to describe the Group 2 elements? Interactive periodic table showing names, electrons, and oxidation states. What alkaline metal is a main component in our bones? Most elements are metals. The Mg2+ ion is extremely common in seawater and can be filtered and then electrolyzed to produce pure magnesium. One of the most important applications of beryllium is the production of radiation windows. These outer electrons are called valence electrons. Beryllium is extremely light with a high ionization energy, and it is used primarily to strengthen alloys. Beryllium was first identified in 1798 by Louis-Nicolas Vauquelin, while performing a chemical analysis on aluminum silicates. Clipping is a handy way to collect important slides you want to go back to later. If the atomic numbers of magnesium and oxygen are 12 and 8 respectively, draw their electronic configurations and show the process of … This procedure was repeated several times until the radioactivity of the precipitate no longer increased, as radium chloride could be electrolyzed using a mercury cathode to produce pure radium. Use the buttons above to change your view of the periodic table and view Murray Robertson’s stunning Visual Elements artwork. 1. The two rows of 14 elements at the bottom of the periodic table are the lanthanides and the actinides, whose positions in the periodic table are indicated in group 3. Therefore, the valency of chlorine Cl is 1, that is, (8 - 7). Read more. All known radium compounds have a crimson colored flame. Progressing down group 2, the atomic radius increases due to the extra shell of electrons for each element. Low density - can float on water. . In solutions, it remains in elemental form only for pH values below 5.5. Magnesium can be found in over 100 different minerals, but most commercial magnesium is extracted from dolomite and olivine. Cation: $$H_2O_{(l)} + BeO_{(s)} + 2H_3O^+_{(aq)} \rightarrow [Be(H_2O)_4]^{2+}_{(aq)}$$, Anion: $$H_2O_{(l)} + BeO_{(s)} + 2OH^-_{(aq)} \rightarrow [Be(OH)_4]^{2-}_{(aq)}$$. See About the Periodic Table for information on how Group can be used to characterize an element.. Group 1: alkali metals, or lithium family; Group 2: alkaline earth metals, or beryllium family; Group 3: the scandium family Calcium was not readily available until the early 20th Century. As such, radium compounds are found almost entirely in uranium and thorium ores. The famous Spitzer Space Telescope's optics are composed entirely of beryllium. Table 5.2 summarises the patterns or trends in the properties of the elements in group 1. (a) Ba (b) K (c) Mg (d) Be (e) Ra. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Because radium is a decay product of uranium, it can be found in trace amounts in all uranium ores. strontium ranelate ($$C_{12}H_6N_2O_8SSr_2$$) is used to treat sufferers of osteoporosis and strontium chloride ($$SrCl_2$$) is used to make toothpaste for sensitive teeth. Periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number. Since 1957, the majority of industrial beryllium is produced by reducing BeF2 with magnesium, making it more readily available. Figure 5.4: Trends in the groups on the periodic table. Reactions with water . Visualize trends, 3D orbitals, isotopes, and mix compounds. Groups 3-11 are termed transition elements. Groups 1, 2, and 13–18 are the main group elements, listed as A in older tables. What is the oxidation state of all Group 2 elements? Learn the basics about Alkaline Earth metals which are a group of chemical elements in the periodic table with very similar properties? 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