The most likely structure from combinations of these atoms

[sergey_le]

an element (we will call it X) got a cofiguration of 1$s^2$2$s^2$2$p^6$3$s^2$s$p^3$ what molecule is moste likely to happened between this element and Mg?
1.MgX
2.$Mg_2$X
3.Mg$X_2$
4.$Mg_3$ $X_2$

how do i do it?with lewis structure?just check what structure makes the most sense? or is there another way?

 

[chemisttree]

What does the octet rule suggest for this atom? How many electrons would you say it “wants?”

 

[sergey_le]

What does the octet rule suggest for this atom? How many electrons would you say it “wants?”

thank you