![]() ![]() Sodium 24 –Ģ4Na 14.9560(15) h It is a radioactive isotope which decays to magnesium-24 by the emission of gamma rays and electrons. The standard atomic weight of this isotope is 22.98976928(2). Sodium 23 –Ģ3Na stable It is a monoisotopic element because it has only single stable isotopes. Sodium 22-Ģ2Na 2.6019(6) ys It is the positron-emitting isotope which is a positron source to create test objects and muons to catalyze deuterium fusion. Isotopes of Sodium element Half-life Characteristics Sodium 18 –ġ8 Na 1.3(4) ×10 – 21 sec It is the shortest-lived isotope compared to all other isotopes of Sodium. There are 4 important sodium isotopes discussed below. Sodium has 20 isotopes which range from sodium-18 to sodium-37. Sodium isotopesĮvery element in a periodic table has one or more isotopes, which have identical chemical properties but are different in their atomic mass number. Therefore Sodium has a +1 charge, the ionic molecule showing the ionic radius. The sodium atom does not have an ionic radius because it is not an ionic compound. The ionic radius of Na + ion is 0.102 nm. The van der Waal’s radius of sodium is 227 pm. The boiling point of a Sodium atom is 882.8 ⁰C. This temperature is the liquefaction point of the Sodium, where the solid state of sodium changes to the liquid state. The melting point of a sodium atom is 97.79 ⁰C. This is because the presence of d-orbitals in K increases the volume thus, density also increases. But there is an exception of Na having a higher density than K. In the periodic table, as we go down the group, there is an increase in the density of the element. The atomic density of Sodium is 0.968g/ cm 3. Pauling electronegativity of Sodium is 0.93. ![]() Sodium electronegativity according to Pauling The atomic weight of Sodium is 22.98977 g/mol. Sodium is present in the s-block, with only one electron in s-orbitals. Sodium lies in the 3rd period of the periodic table. Sodium is placed in the 1st group of the periodic table. The word Sodium is derived from the Latin word “natrium.” Chemical symbol of Sodium Sodium group in the periodic table In detail below, let us discuss some more chemical properties like melting point, boiling point, ionization energy and oxidation state. Sodium exhibits a photoelectric effect as it conducts heat and electricity. Salts of Sodium are highly soluble in water. Sodium is the sixth most abundant element in the earth’s crust. Let us discuss some facts about Sodium in detail. Sodium is a soft, silvery-white alkali metal that is highly reactive. ![]()
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