1.

(a) Write the name of any three elements present in third period. (b) What will be the total number of shells in each and name the valence shell of each. Write configuration of all of these.

Answer»

SOLUTION :(a) Na, Mg and Al are the elements present in third period.
(b) `{:("Element","TOTAL no. of shells","Name of VALENCE shell","Configuration"),(Na,3,M,2","8","1),(Mg,3,M,2","8","2),(AI,3,M,2","8","3):}`


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