1.

Observe the model of periodic table.a. Which element is having S electrons in valence shell? b. Which elements are having 2 electrons in valence sub-shell? c. Which element is having last electron in 3p? d. Which element ends with electronic configuration 4d5 , 5s1 ?

Answer»

a. B; 

b. A, C;

c. C, D; 

d. E



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