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An element x belong to 3rd period and a group 13 of a moderm periodic table determine the valence electron and valency of x and also find molecular formula

of the compound formed when x reacts with a element y ( atomic no 8 )


. Group 13 was previously called as group 3A and the question is solved on basis that it is group 3A or 13. 1. Electronic configuration, 2.8.3 2.  XCl3 3.X2O3 . The element is Al and it forms amphoteric oxides.  
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