1.

Nuclear charge of an element B is twice that of A. If A has two completely filled orbits and L shell is its outermost orbit, find out atomic numbers of A and B.

Answer»

SOLUTION :(i) CALCULATION of number of electrons in FIRST 2 shell.
(ii) Calculation of atomic number of A
(iii) Calculation of atomic number of B from A
(IV) 10,20


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