Question

Three elements X,Y and Z have electronic configuration as follows:
X-2
Y-2,6
Z-2,8,2
(a)Which element belongs to second period?
(b)Which element is placed in group 18?
(c)which element belongs to the third period and second group?​

Answer 1

Answer:

a Z

b. X

c. Y

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Answer 2

Answer:

i.....z

ii.....x

iii....y