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08/10/2021 5:07 pm
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(a) What is the fundamental difference in the electronic configurations between the group 1 and group 2 elements?
(b) On the basis of electronic configuration, how will you identify:
(i) chemically similar elements?
(ii) the first element of a period?
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08/10/2021 5:08 pm
(a) The fundamental difference between the electronic configuration of group 1 and group 2 elements is that group 1 elements have 1 valence electron in their atoms whereas group 2 elements have 2 valence electrons in their atoms.
(b) (i) All the chemically similar elements will have same valence electrons.
(ii) The 1st element in a period is determined by the no. of valence electrons in its atoms. The 1st element of every period has 1 valence electron.