The most electronic parameter outer is ns2 np1-6. P- Block Elements: They are part of group-13 to 18. S- block Elements: Group-1 (Alkali metals) and Group-2 (Alkaline earth metals) elements with outermost electronic configurations of ns1 and ns2, respectively. The elements of the s-and p-block are called major group elements, or representative elements. Main Group Elements/ Representative Elements: Elements are Classified into: s-, p-, d- and f- blocks. Modern Periodic Law: Elements physical and chemical properties are the periodic features of their atomic numbers. The position of an element in the periodic table therefore depends on its atomic number as compared with its atomic mass. Moseley, the English physicist has shown that an element's atomic numbers are more fundamental properties than its atomic mass. Mandeleev’s Periodic Law:- The elements ' properties are the periodic function of their atomic masses.
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