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&, , , , , , , , , d) R The members of the family combine with halogen, w which re (RSET, , Reactivity of alkali metls with particular halogen increases from Li to Cs., , : Alkali metals react with water and other compounds, , atoms such as hydrogen halides, acetylene etc. to, , I, 40yF Solubility in liquid ammo in liquid ammonia, g) Reaction with sulphur and phosphorus - le. and, phosplionis on ind phOsphidés respectively., , % ip between Li and M;, , , , , , , , . The fai, , Both BiOH and Mg(@H)> are WEARIBASEs., , iii) Carbonates of both on heating decompose to produce oxides and, carbondioxide., , iv) Both react with nitrogen to giveliOMiGnitndes., , v) Nitfafés of both decompose on, , vi) Both Elland Mig do, , vii) Because of covalent character LiCl and MgCl, are soluble in ethanol., , viii) The aeapal bicarbonates and fluorides bfiboth fal andiMg are epaninghy, i Sodium ions participate in |, ii) Sodium ions also jab flow of water across the cell membranes and in, , iii) Potassium ions are the most abundant cations within cell fluids, where they, , activate many enzymes, participate in oxidation of glucose to produce ATP., , iv) Potassium ions in combination with sodium ‘ions are. responsible for, transmission of nerve signals., , v) The functional features of nerve cells depend upon the sodium potassium ion, gradient that is established in the cell., , “> Group 2 elements: Alkaline earth metals, , (a) Atomic radii : The htomie radii of alkaline earth metals are:, , smaller than the corresponding alkali metals and the, , is because _on, , , , , , , though, . This, due to the, , , , is in each succeeding element., (b) Ionic radii: the atoms of these elements form ns which show the same, , trend of (RASCMMIENEIESIZE down the group., (c) Ionization enthalpy: The sikatine earth Wetals have fairly low Ionizations, , enthalpies though greater than those of the corresponding elements of group | and, iis vale ans downli Oup