# group 2 periodic table

They are called s-block elements because their highest energy electrons appear in the s subshell. (a) Ba (b) K (c) Mg (d) Be (e) Ra. Low density - can float on water. Interactive periodic table showing names, electrons, and oxidation states. Strontium has four stable isotopes: 84Sr, 86Sr, 87Sr, and 88Sr. Group. CCEA Chemistry. The noble gases are very unreactive. 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. The four most stable isotopes are 223Ra, 224Ra, 226Ra, and 228Ra. In nature, it is only found in combination with other elements. 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. Elements magnesium and oxygen respectively belong to group 2 and group 16 of the Modern Periodic Table. Groups are numbered from 1 to 18. CaCO3(s) → CaO(s) + CO2(g) (calcination), CaO(s) + H2O(l) → Ca(OH)2(s) (slaking), Ca(OH)2 + CO2(g) → CaCO3(s) + H2O(l) (carbonation). . They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). If we exclude the transition metal elements, we can say that atoms which occupy the same group of the periodic table have the same number of outer electrons. Which of the following is NOT an alkaline earth metal? . In solutions, it remains in elemental form only for pH values below 5.5. 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. Atomic and physical properties . Metals are on the left side and non-metal are on the right side of the periodic table . Group 2 - the periodic table By – Sameer Sharma Abhishek Bansal Nikhil Kumar Abhay Rana Achhar Singh 2. We know that chlorine has 7 valence electrons. GROUPING METHOD. 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. Radium is radioactive and is not considered in this section. However, none are stable. . Group I - the alkali metals Lithium, sodium and potassium all belong to Group 1. Strontium was first discovered in 1790 by Adair Crawford in Scotland and is named after the village it was discovered in, Strontian. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. 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. Which Group 2 element has a scarlet flame color? Back to Elements List. Calcium has a melting point of 1115 K and gives off a red flame when ignited. Low melting points in comparison with other metals. No public clipboards found for this slide. Currently, $$RaCl_2$$ is still used to separate radium from barium and it is also used to produce Radon gas, which can be used to treat cancer. Beryllium was first identified in 1798 by Louis-Nicolas Vauquelin, while performing a chemical analysis on aluminum silicates. An element X in group 2 has a valency of 2. [ "article:topic", "barium", "Magnesium", "strontium", "calcium", "Beryllium", "Radium", "showtoc:no", "Group 2" ], https://chem.libretexts.org/@app/auth/2/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FBookshelves%2FInorganic_Chemistry%2FModules_and_Websites_(Inorganic_Chemistry)%2FDescriptive_Chemistry%2FElements_Organized_by_Block%2F1_s-Block_Elements%2FGroup__2_Elements%253A_The_Alkaline_Earth_Metals%2F1Group_2%253A_Chemical_Reactions_of_Alkali_Earth_Metals%2FGroup_2%253A_General_Properties, Atomic Number = 4 Mass = 9.012 g mol, Atomic Number = 12 Mass = 24.31 g mol, Atomic Number = 20 Mass = 40.08 g mol, Atomic Number = 38 Mass = 87.62 g mol, Atomic Number = 88 Mass = 226.0 g mol, Properties of Individual Alkaline Earth Metals, information contact us at info@libretexts.org, status page at https://status.libretexts.org. We can use the information in Table 5.2 to predict the chemical properties of unfamiliar elements. Groups 3-12 are termed d-block elements. Calcium was isolated in 1808 by Sir Humphry Davy by the electrolysis of lime and mercuric oxide. 28Mg is the only known radioactive isotope of Magnesium and it has a half-life of around 21 hours. Radium compounds are extremely rare in nature because of its short half-life and intense radioactivity. About 82% of naturally occurring strontium comes in the form of 88Sr. The Royal Society of Chemistry's interactive periodic table features history, alchemy, podcasts, videos, and data trends across the periodic table. The Periodic Table; Trends in Group 2 Compounds; Title . Because radium is a decay product of uranium, it can be found in trace amounts in all uranium ores. There are a total of 18 groups. Abhay Rana Another important calcium compound is calcium hydroxide ($$Ca(OH)_2$$). 2.11 Group II elements and their compounds Looks at the trends in the reactions between the Group 2 elements and water. Some applications of strontium compounds include strontium carbonate ($$SrCO_3$$), strontium sulfate ($$SrSO_4$$), and strontium nitrate ($$Sr(NO_3)_2$$), which can be used as a red flame in fireworks. In the periodic table, chemical elements are present in rows horizontally in order of increasing atomic number and vertically according to the recurring properties of their atoms. Because of its high melting point, $$BeO$$ is a good heat conductor in electrical insulators. Table 5.2 summarises the patterns or trends in the properties of the elements in group 1. What is the oxidation state of all Group 2 elements? The Mg2+ ion is extremely common in seawater and can be filtered and then electrolyzed to produce pure magnesium. A period 2 element is an element in the second period (row) of the periodic table. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This is because they all have 1 electron in their outer shell which is why they react in similar ways. Show health and safety information. Since 1957, the majority of industrial beryllium is produced by reducing BeF2 with magnesium, making it more readily available. Legal. The three stable isotopes of magnesium are 24Mg, 25Mg, and 26Mg. Beryllium is extremely light with a high ionization energy, and it is used primarily to strengthen alloys. Cation: $$H_2O_{(l)} + BeO_{(s)} + 2H_3O^+_{(aq)} \rightarrow [Be(H_2O)_4]^{2+}_{(aq)}$$, Anion: $$H_2O_{(l)} + BeO_{(s)} + 2OH^-_{(aq)} \rightarrow [Be(OH)_4]^{2-}_{(aq)}$$. The periodic table is a way of arranging the elements so patterns in their properties and reactions can be identified and explained. Alternative names for Group 2 are: This beryllium is not commercially available as it cannot be economically mass produced. A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. It was later renamed beryllium ( from the Greek word beryl meaning "to become pale") after a pale, beryllium-containing gemstone called a beryl. There are two different numbering systems that are commonly used to designate groups and you should be familiar with both. Group 2 - the periodic table Boiling points The minimal absorption by Beryllium greatly reduces heating effects due to intense radiation. Calcium, in the presence of Vitamin D, is well known for its role in building stronger, denser bones early in the lives of humans and other animals. 0 votes. . $Ca_{(s)} + H_{2\, (g)} \rightarrow CaH_{2\, (s)}$, $Sr_{(s)} + O_{2 (g)} \rightarrow SrO_{2\, (s)}$, $3Mg_{(s)} + N_{(g)} \rightarrow Mg_3N_{2 (s)}$, $Mg_{(s)} + Cl_{2(g)} \rightarrow MgCl_{2(s)}$, $Ba_{(s)} + 2H_2O_{(l)} \rightarrow Ba(OH)_{2(aq)} + H_{2(g)}$. This is what is meant by periodicity or periodic table trends. Why is the term alkaline used to describe the Group 2 elements? Magnesium was first discovered in 1808 by Sir Humphry Davy in England by the electrolysis of magnesia and mercury oxide. 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. Beryllium is the very first element in Group 2, and has the highest melting point (1560 K) of any element in the group. Magnesium can be found in over 100 different minerals, but most commercial magnesium is extracted from dolomite and olivine. The three most abundant: 223Ra, 224Ra and 226Ra decay by emitting alpha particles, whereas 228Ra decays emitting a beta particle. Trends in Group 2 Compounds . The group number is an identifier used to describe the column of the standard periodic table in which the element appears. A worksheet and fully complete answer sheet which is aimed at A level Chemistry students and covers group 2 chemistry. By – Sameer Sharma This short article about chemistry can be made longer. Calcium is an important component in cement and mortars, and thus is necessary for construction. It is the 15th most abundant element on Earth and is commonly found in the form of the mineral celestite. Group 2: General Properties. It can be used in aircraft production in nozzles of liquid-fueled spacecrafts, and mirrors in meteorological satellites. Which group 2 metal has the largest ionization energy? The Group 2 elements are called the alkaline earth metals. Groups 3–12 are in the middle of the periodic table and are the transition elements, listed as B in older tables. It is the 8th most abundant element in the Earth's crust, constituting 2% by mass. It is also used to aid cheese production. 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. 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