Answer:
(D) 2Na+F₂ → 2NaF
Step-by-step explanation:
The option D is correct because only this equation is balanced.
(D) 2Na+F₂ → 2NaF
There are two atoms of sodium and and fluorine are present on both side of equation so it is balanced. while
(A) 2Al+3O₂ → Al₂O₃
There are two aluminium and six oxygen atoms are present on left side while two aluminium and three oxygen atoms are on right side. So equation is not balanced.
(B) Mg+O₂ → 2MgO
There are one magnesium atom and two oxygen atom on left side while two magnesium and two oxygen on right side. So equation is not balanced
(C) 2Al + F₂ → 2AlF₃
There are two aluminium and two fluorine atom on left side while two aluminium and six fluorine on right side. So equation is not balanced.