Given below are the atomic radii of three elementsA, B and C of the peroodic table,each having n electrons in the outermost shell of its atom. Answer the following (i) Will the valencies of these elements be the same or different ? (ii) which the element will have the highes atomic number ?

Given below are the atomic radii of three elementsA, B and C of the pe

1.	Given below are the atomic radii of three elementsA, B and C of the peroodic table,each having n electrons in the outermost shell of its atom. Answer the following (i) Will the valencies of these elements be the same or different ? (ii) which the element will have the highes atomic number ?
Answer» Solution :(i) All the elements have the same number of electrons in the their OUTERMOST shell i.e.,valence shell. Hence, these elements will be present in the same group of the periodic table and their VALENCIES will be the same. (ii) In a group, atomic RADII of elements INCREASE as we move from top to bottom. Hence, USING the given data of atomic radii the order radii the order of these elements fromtop to bottom would be A,B and C. We know that the atomic number of elements increases as we go down a group of the periodic table. Thus, element C will have the highest atomic number.