Q. 234.7( 3 Votes )

An element has atomic number 19. Where would you expect this element in the periodic table and why?

Answer :

The element has atomic number = 19


The electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1


Number of valence electrons (4s1) = 1


Period number = 1


Group number = 4


This means the element having atomic number 19 belongs to s-block because the period number is 1.


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