1.

X nelongs ot IA or first rop and fifth period and y succeedsX in the group .Z succeeds Y in the period Arrange the suitable statement in the correct sequence in order ot arrngeX,Y and Z in the incresing order of their atomic sizes

Answer»

DBCA
bdca
cad
dca

Solution :(i) Determination of the positons of y and Z inthe peroidc table based OPN the position of x
(ii) Determination of the NUMBER of shells and the number of valence elctrons present in x y and z
(iii) Efect of the number of valence electrons and number of shells on ATOMIC size


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