Beryllium was first identified in 1798 by Louis-Nicolas Vauquelin, while performing a chemical analysis on aluminum silicates. In solutions, it remains in elemental form only for pH values below 5.5. The formation of calcium hydroxide is given below: \[CaO_{(s)}+H_2O_{(l)} \rightarrow Ca(OH)_2\]. Another notable isotope is cosmogenic 10Be, which is produced by cosmic ray spallation of oxygen and nitrogen. Calcium was isolated in 1808 by Sir Humphry Davy by the electrolysis of lime and mercuric oxide. Have questions or comments? Magnesium has a melting point of 923 K and reacts with water at room temperature, although extremely slowly. What is the oxidation state of all Group 2 elements? Beryllium is the very first element in Group 2, and has the highest melting point (1560 K) of any element in the group. 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. See our User Agreement and Privacy Policy. Radium was first discovered in 1898 by Marie Sklodowska-Curie, and her husband, Pierre Curie, in a pitchblende uranium ore in North Bohemia in the Czech Republic; however, it was not isolated as a pure metal until 1902. See our Privacy Policy and User Agreement for details. This is because they all have 1 electron in their outer shell which is why they react in similar ways. Looks at the trends in the reactions between the Group 2 elements and water. The elements in the group include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Legal. Properties: Soft metals that can be cut with a knife. When the elements are thus arranged, there is a recurring pattern called the ‘periodic law’ in their properties, in which elements in the same column (group) have similar properties. Alkaline-earth metals: The alkaline-earth metals make up Group 2 of the periodic table, from beryllium (Be) through radium (Ra). The isotope which has the longest half life is 226Ra, which is produced by the decay of Uranium. Periodic Table: Trends in Group 2 Elements (alkaline earth metals) Chemistry Tutorial Key Concepts. If you mean "the oxidation state +2 is stable for the elements of the alkali metals" then the statement is not correct. Calcium carbonate is a component of shells in living organisms, and is used as a commercial antacid. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Although many characteristics are common throughout the group, the heavier metals such as Ca, Sr, Ba, and Ra are almost as reactive as the Group 1 Alkali Metals. It can be used in aircraft production in nozzles of liquid-fueled spacecrafts, and mirrors in meteorological satellites. Watch the recordings here on Youtube! Magnesium can be found in over 100 different minerals, but most commercial magnesium is extracted from dolomite and olivine. You can change your ad preferences anytime. In a biological sense, magnesium is vital to the body's health: the Mg2+ ion is a component of every cell type. 1 answer. Group 2 - the periodic table By – Sameer Sharma Abhishek Bansal Nikhil Kumar Abhay Rana Achhar Singh 2. IntroductIon - Group 2 contains soft, silver metals that are less metallic in character than the Group 1 elements. For example, all of the elements in Group 2, shown left, have two outer electrons. The famous Spitzer Space Telescope's optics are composed entirely of beryllium. Group I - the alkali metals Lithium, sodium and potassium all belong to Group 1. As beryllium is almost transparent to x-rays, it can be used in windows for x-ray tubes. The Mg2+ ion is extremely common in seawater and can be filtered and then electrolyzed to produce pure magnesium. It can also be used in fireworks as it produces a scarlet flame color. Cation: \(H_2O_{(l)} + BeO_{(s)} + 2H_3O^+_{(aq)} \rightarrow [Be(H_2O)_4]^{2+}_{(aq)}\), Anion: \(H_2O_{(l)} + BeO_{(s)} + 2OH^-_{(aq)} \rightarrow [Be(OH)_4]^{2-}_{(aq)}\). Groups 1-2 (except hydrogen) and 13-18 are termed main group elements. \[ Ca_{(s)} + H_{2\, (g)} \rightarrow CaH_{2\, (s)} \], \[ Sr_{(s)} + O_{2 (g)} \rightarrow SrO_{2\, (s)}\], \[ 3Mg_{(s)} + N_{(g)} \rightarrow Mg_3N_{2 (s)} \], \[ Mg_{(s)} + Cl_{2(g)} \rightarrow MgCl_{2(s)} \], \[ Ba_{(s)} + 2H_2O_{(l)} \rightarrow Ba(OH)_{2(aq)} + H_{2(g)} \]. They are called s-block elements because their highest energy electrons appear in the s subshell. No public clipboards found for this slide. Some examples of magnesium compounds include: magnesium carbonate (MgCO3), a white powder used by athletes and gymnasts to dry their hands for a firm grip; and magnesium hydroxide (Mg(OH)2), or milk of magnesia, used as a common component of laxatives. about group 2 of periodic table its very much helpful for all. 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