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InterviewSolution
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Atomic number of an element is considered to be a more appropriateparameter than its atomic mass for a chemist." Take the example of theelement X (atomic number 13) to justify this statement. |
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Answer» The properties of elements depend on the valence electrons in the atom,which in turn depends on the total number of electrons, i.e. atomic number.Hence, the atomic number is considered a more appropriate parameter thanthe atomic mass for the classification of elements in the modern periodictable. Atomic no : 13 , Aluminium. It is metallic in nature.it's electronic configuration is 1s², 2s²,2p^6, 3s², 3p¹ here last electron enters in p- orbital . so, aluminium belongs to p- block. group of aluminium = 10 + valance electron = 10 + 3 = 13 [ valance electron of Al = 3 ]principal quantum number is 3 so, aluminium is 3rd period element. here, we can easily locate Aliminumium in periodic table and by to find electronic configuration using atomic number, how we understand its characters. |
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