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These elements are Beryllium, Magnesium, Calcium, Strontium, Barium and Radium. Alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. Alkaline earth metals are metals that have two valence electrons in their outermost shell. They are related to the Alkali metals, but they do not react as much because they need more energy to remove their two electrons, So they do not have to be stored in petrol. Like the alkali metals, the alkaline earth metals are so reactive that they are never found in elemental form in nature. The alkaline earth metals tend to form +2 cations. Because they form +2 ions that have very negative reduction potentials, large amounts of energy are needed to isolate them from their ores. Alkali metals and alkaline earth metals have many similar properties, but this article discusses mainly their differences. They all occur in nature, but are only found in compounds and minerals, not in their elemental forms. The earliest known alkaline earth was line (latin : calx). Alkaline earth metals appear shiny, silvery-white and are found in the earth's crust. You can call this group as group 2 element. We should store these metals always in inert liquids such as kerosene because they rapidly react with the air, water vapour and oxygen in the air. The alkaline earths are the elements located in Group IIA of the... Properties of the Alkaline Earth Metals. 1. Because the alkaline-earth metals have two electrons in their outer shell, they react easily with other elements and are found in nature only in compounds. They have a gray-white lustre when freshly cut but tarnish readily in air, particularly the heavier members of the group. Both alkali metals and alkaline earth metals are good electrical and heat conductors. Alkali metals have the electronic configuration of [Noble gas] ns1 while Alkaline earth metals have, [Noble gas] ns2 electronic configuration. “Alkaline Earth Metal.” Wikipedia, Wikimedia Foundation, 20 May 2018. Sometimes they explosively react with other substances. Many of alkali metal compounds (NaCl, KCl, Na2CO3, NaOH) are commercially very important. The alkaline earth metals (beryllium, magnesium, calcium, strontium, barium, and radium) are the second most reactive metals in the periodic table (Table 3.7), and, like the Group 1 metals, have increasing reactivity in the higher periods. The alkaline earth metals are in the second group of the periodic table. Location of the Alkaline Earths on the Periodic Table. The densities of Lithium and Sodium are less than the density of water. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Summary. 2. Alkaline earth metals are in the second group of the periodic table. But right now we’d like to explain about uses of alkaline earth metal in daily life, which is beryllium, magnesium, calcium, strontium, barium and radium are inside that group. All the elements in this group are denser than water. Electronegativity of alkaline earth metals: The electro negativity values of alkaline earth metals are quite close to those of alkali metals, though slightly more. English chemist Sir Humphry Davy was the first to isolate many of the alkaline earth metals including calcium, strontium, magnesium, and barium. All rights reserved. The name alkaline earth suggest that these metals form alkalies with water and are found in earth’s crust. Similar to alkaline metals, these elements also do not occur freely in … They can be easily distinguished from the other metals as they have only 2 electrons in their outer shell and can easily donate those electrons to achieve stability. Overview and Key Difference They are any of the metallic elements belonging to Group 2 of the periodic table: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Calcium plays an important role in helping us to build strong bones and magnesium is used to help regulate the body's temperature. Similar with alkali metals, alkaline earth metal also have the properties of base, as opposed to an acid. The word earth was applied in old days to a metallic oxide and because the oxides of calcium, strontium and barium produced alkaline solutions in water and, therefore these metals are called the alkaline earth metals. Terms of Use and Privacy Policy: Legal. After some quick brainstorming and mish-mashing of names, the two concepts were combined to create the Frankenstein-creature we now call alkaline earth metals. Group II elements include; Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). In … Coming from Engineering cum Human Resource Development background, has over 10 years experience in content developmet and management. Alkaline earth metals are also known as Group II elements. The metal components of the oxides behaved differently, but still resembled the alkali family metals. 3. … Alkaline Earth Metal. They become stable by gaining the electron configuration of noble gasses through the donation of their outermost electrons. What Are the Properties of the Alkaline Earth Metals? Some characteristics of alkaline earth metals are: An oxidation number of +2 which makes them very reactive. The alkaline earths possess many of the characteristic properties of metals. Not found freely in nature. They tend to form ionic bonds, except for beryllium which forms covalent bonds. Alkaline earth metals get the name 'alkaline' because of the basic nature of the compounds they form when bonded with oxygen. There are six alkaline earth metals, including beryllium, magnesium, calcium, strontium, barium and radium. The alkaline earth metals are the second most reactive family of elements. It determines the valency of the elements. Pure metals have a silver-grey color, but they tend to decolorize quickly when exposed to air because they form an oxide layer on the surface. Therefore, the difference between alkali metals and alkaline earth metals is that all alkali metals have an electron in their outermost shell whereas all the alkaline earth metals have two outer electrons. Radium, barium, and strontium have few industrial applications, while magnesium and calcium have many uses in manufacturing and industry. Same as alkali metals, these metals are also good conductors in heat and electricity. The alkaline earth metal calcium is also present in significant quantity. Present in the earth's crust but not in their basic form. However, the other elements are denser than water. Alkaline Earth metals are very reactive because they readily give up their two valence electrons to achieve a full outer energy level, which is the most stable arrangement of electrons. The name "alkaline earths" comes from an old name for the oxides of the elements. All of the alkaline earth metals except magnesium and strontium have at least one naturally occurring radioisotope. With regard to the valency of these metals, all alkali metals have an electron in their outermost shell. The alkaline earth metals are the second group of metals on the periodic table. Side by Side Comparison – Alkali Metals vs Alkaline Earth Metals in Tabular Form Alkaline-earth metal - Alkaline-earth metal - Physical and chemical behaviour: The alkaline-earth elements are highly metallic and are good conductors of electricity. Available here, 1.’Atomic radius of alkali metals and alkaline earth metals’By DePiep – Own work, (CC BY-SA 3.0) via Commons Wikimedia, Filed Under: Chemistry Tagged With: alkali metals, alkaline earth metals. It is very radioactive and is dangerous to handle. They are called alkaline because they form solutions with a pH greater than 7, making them bases or "alkaline.". Group II elements include; Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra). Alkali metals are the elements present in the first group of the periodic table. Calcium and magnesium are important for animal and plant life. Available here   They are Lithium (Li), Sodium(Na), Potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr). The six alkaline earth metals—beryllium, magnesium, calcium, strontium, barium, and radium—comprise Group 2 on the periodic table of elements. This group of elements includes beryllium, magnesium, calcium, strontium, barium, and radium. They all have low densities, melting points and boiling points, and they tend to form solutions with a pH greater than 7. Alkaline earth metals are in the second group of the periodic table. 1. What are Alkali Metals Their melting points are relatively lower than other metals. Tepper, Frederick, and James L. Dye. The alkaline earth metals are the second most reactive family of elements. This puts them beside the alkali metals in Group 1, and as their names suggest, the two families share a number of characteristics, most notably their high reactivity. All the alkaline earth metals readily lose their two outermost electrons to form cations with a 2+ charge. Beryllium is sufficiently hard to scratch glass, but barium is only slightly harder than lead. They are silvery, shiny, and relatively soft metals. Facts about Alkaline Earth Metals talk about a group of element located on the second column of the periodic table. The alkaline earth metals have the common properties of metals, are silvery-grey in colour and good conductors of heat and electricity. Radium is formed from the decay of uranium. They are fairly reactive under standard conditions. The key difference between alkali metals and alkaline earth metals is that all alkali metals have an electron in their outermost shell whereas all the alkaline earth metals have two outer electrons. As both Alkali metals and alkali earth metals are the first two groups in the periodic table, the difference between alkali metals and alkaline earth metals is a subject of interest for any chemistry student. The elements included in the group include radium, barium, strontium, calcium, magnesium and beryllium. Compare the Difference Between Similar Terms. The elements of this group are quite similar in their physical and chemical properties. 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The alkaline earth metals are the second group of metals on the periodic table.They are related to the Alkali metals, but they do not react as much because they need more energy to remove their two electrons, So they do not have to be stored in petrol.As ions they have a charge of +2a. All of these metals are commercially valuable. Calcium and magnesium are fourth and fifth in the reactivity series. The alkaline earth metals are less reactive than the alkali metals. 4. Alkaline earth metals are in the second group of the periodic table. Also, like the alkali metals, or indeed any other family on the periodic table, not all members of the alkali metal family are created equally in terms of their abundance on Earth or their usefulness to human life. Alkaline earth metals have only two electrons in their outermost electron layer. As ions they have a charge of +2a. This group includes the elements lithium, sodium, potassium, rubidium, caesium and … What are Alkaline Earth Metals And all alkaline earth metals have two outer electrons. 3. The alkaline earth metalsare all of the elements in the second column (column 2A) of the periodic table. Barium, an Alkaline Earth Metal. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The heterocyclic beryllole is the first antiaromatic molecule containing an alkaline earth metal in its π system. Alkali and Alkaline Earth Metals The elements in group one of the periodic table (with the exception of hydrogen - see below) are known as the alkali metals because they form alkaline solutions when they react with water. alkaline-earth metal Any of a group of metallic elements that includes beryllium, magnesium, calcium, strontium, barium, and radium. This group includes beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). They can achieve the noble gas state easily, by removing the outermost electron in the valence shell. Alkaline earth metals have stronger metallic bonds as compared to the alkali metals present in the same period. They react with halogens to form compounds called halides. The alkali metals are the elements present in the first group of the periodic table. 4. 5. Figure 01: Atomic Radius of Alkali and Alkali Earth Metals. Alkali metals have only +1 ionic charge in their compounds when alkaline earth metals have +2 ionic charges in their compounds. Modern version of the periodic table of the elements. The most significant difference between these two groups is the electronic configuration. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Moreover, alkali metals are very soft and they can be cut with a sharp knife. As can be seen from Figure 8.6.1.2, Alkaline earth metals' possess large negative M 2+/0 standard reduction potentials which strongly favor the +2 cation. Alkali metals and alkaline earth metals are the “S-block” elements because elements in both of these groups have their outermost electron(s) in the s-subshell. They burn with various colored flames as follows: beryllium (white), magnesium (bright white), calcium (red), strontium (crimson), barium (green), and radium (red). Beryllium, magnesium, calcium, strontium, barium and radium are all shiny, and silvery-white. The elements in these two groups are the most reactive metals in the periodic table. “Alkali Metal.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 21 June 2017. The alkaline earth metals are shiny, silvery-white, and somewhat reactive metals at standard temperature and pressure. The alkaline earth metals are the elements that correspond to group 2 of the modern periodic table. Alkaline earth metals are good reducing agents that tend to form the +2 oxidation state. The alkaline earth metals (beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: 1. shiny 2. silvery-white 3. somewhat reactive metals at standard temperature and pressure 4. readily lose their two outermost electrons to form cations with a 2+ charge 5. low densities 6. low melting points 7. low boiling poi… However, alkali earth metals are harder than the alkali metals. All of them except beryllium react strongly with water. They have two outer valence electrons which they readily lose. 2. Comparatively, alkali metals are more reactive than alkaline earth metals. They are all metals and very reactive therefore none of these metals do not occur as free metals in nature. They all occur in nature, but are only found in compounds and minerals, not in their elemental forms. Alkali metals and the alkaline earth metals are the group I and group II elements in the periodic table respectively. Similar to alkaline metals, these elements also do not occur freely in nature and they are also very reactive. But not in their compounds, while magnesium and beryllium comes from an old name for the oxides differently! Metals are good conductors of heat and electricity only found in earth ’ s crust with regard to valency! Britannica, Inc., 21 June 2017 a group of the characteristic properties of base, as to... Group as what are alkaline earth metals 2 of the six chemical elements that correspond to group 2 ( IIa of. Development background, has over 10 years experience in content developmet and management are very soft and can! Beryllium is sufficiently hard to scratch glass, but barium is only slightly than. Important for animal and plant life 2 ( IIa ) of the nature! 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