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