What is rule to locate the postion of period and group in modren periodic table? for example locate the postion of period and group of 115 element?
Asked by Babita Devi | 18th Oct, 2010, 07:09: PM
The principal quantum number of the valenc shell represents the period to which an element belongs.
The group to which an element belongs can be predicted on the basis of number of electrons present in its outermost shell or penultimate shell as given below:
a)s-block no of group =no of valence electrons
b)p-block no of group = 10+ no of valence electrons
c)d -block no of group = 2 + no of (n-1) d electrons
Answered by | 19th Oct, 2010, 08:05: PM
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