Answer:
(i) The electronic configuration of the
element is \[3{{s}^{2}},3{{p}^{4}}\]. Thus, the element belongs to 3rd period
and group 16.
(ii) The electronic
configuration of the element is\[3{{d}^{2}}4{{s}^{2}}\]. Thus, the element
belongs 4th period and group 4.
(iii) The electronic configuration of the element is\[4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\].
Thus, the element belongs to 6th period, group 3 (Lanthanide).
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