Question

electronic confuguration,group numberand formula of
oxide formed by an element having atomic number 13

Answer 1

2,8,3 electronic configuration
13 group
element is Al
Al2O3

Answer 2

atomic number = 13

electronic configuration = 1s2 , 2s2 , 2p6, 3s2 , 3p1

or

electronic configuration = 2,8,3

group number = 13

formula of oxide = X2O3

the element is aluminum

so the oxide = Al2O3