Density: Like alkali metals the density of alkaline earth metals also decreases down the order but in an irregular manner due to difference in crystal structure of these elements. Explanation: Hope this will help you.. Which member of the alkaline earth metals family has: (i) least reactivity (ii) lowest density (iii) highest boiling point (iv) maximum reduction potential 2 See answers jayaswami6878 jayaswami6878 Answer: Maximum reduction potential.. All of the alkaline earth metals, except magnesium and strontium, have at least one naturally occurring radioisotope: beryllium-7, beryllium-10, and calcium-41 are trace radioisotopes. The general electronic configuration of Group 2 elements is ns 2. It is the total differential of the d = m/v equation, not the equation itself, that gives you the effect of increasing row number on density. Not found freely in nature. Be 2+ > Mg 2+ >Ca 2+ > Sr 2+ > Ba 2+. Alkaline Earth Metals. In most cases, the alkaline earth metals are ionized to form a 2+ charge. Some characteristics of alkaline earth metals are: An oxidation number of +2 which makes them very reactive. metals, nonmetals and metalloids. The alkaline earth metals are in the second group of the periodic table. Alkali earth metals have the capability to lose the two electrons in their outer shell. Alkaline earth metals are good reducing agents that tend to form the +2 oxidation state. Along with Alkaline Earth Metals, you can also know more about the metals in other categories like Heavy Metals and Precious Metals. For a metal, alkali earth metals tend to have low melting points and low densities. The hydration enthalpies of alkaline earth metal ions decreases as the size of the metal ion increases down the group i.e. All isotopes of radium are radioactive. Alkali metals belong to the s-block elements occupying the leftmost side of the periodic table.Alkali metals readily lose electrons, making them count among the most reactive elements on earth. d = m/v tells you nothing about what happens to m and v as you increase the row number of the atom. The alkaline earth metals have much higher melting points than the alkali metals: beryllium melts at 1287ºC, magnesium at 649ºC, calcium at 839ºC, strontium at 768ºC, barium at 727ºC, and radium at 700ºC. According to the study of chemical elements, all elements are mainly classified into three main types, i.e. ). Calcium-48 and barium-130 have very long half-lives and thus occur naturally. As can be seen from Figure \(\sf{\PageIndex{2}}\), Alkaline earth metals' possess large negative M 2+/0 standard reduction potentials which strongly favor the +2 cation. Distributed in rock structure. Keywords: Pseudopotential, Alkaline earth metals, Lattice dynamics, Lattice mechanical properties. Name: Beryllium Symbol: Be Atomic Number : 4 Beryllium has a Melting Point of : 1278.0 °C (1551.15 K, 2332.4 °F) No. The alkaline earth metals tend to form +2 cations. Reason: Due to smaller size of alkaline earth metal ions as compared to alkali metal ions ,the hydration enthalpies of alkaline earth metal ions are larger than those of alkali metal ions.The compounds of alkaline earth metals are … Don't confuse an equation with the change in the variables in that equation as a function of something else (in this case, At. Being a metal, they are obviously good conductors of heat and electricity. DOI: 10.21272/jnep.11(2).02018 PACS number: 71.20.Dg 1. In this article, we will explain the electronic configurations, ionization enthalpy, hydration enthalpy and atomic, ionic radii and other physical and chemical properties of the group one alkali metals. Present in the earth's crust but not in their basic form. 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