Answer: A) [tex]Li_2O[/tex]
Explanation: In order to form a neutral compound the charges must be balanced. Thus in order to neutralize the 2- charge on oxygen atom, two atoms of lithium with +1 charge must combine.
Lithium is a metal with one valence electron to form [tex]Li^+[/tex].
[tex]Lithium(Li):3:1s^22s^1[/tex]
Oxygen is a non metal with 6 valence electrons to give [tex]O^{2-}[/tex]
[tex]Oxygen(O):8:1s^22s^22p^4[/tex]
They combine to form [tex]Li_2O[/tex].
