2. __ mg + __ f₂ → __ mg^{+2}f₂

QUESTION IMAGE

$2. __ mg + __ f₂ → __ mg^{+2}f₂$

Question

mg + f₂ → __ mg^{+2}f₂

Explanation:

Step1: Count atoms on both sides

On the left - hand side (LHS): $1$ $Mg$ atom and $2$ $F$ atoms ($F_2$ has $2$ $F$ atoms). On the right - hand side (RHS): $1$ $Mg$ atom and $2$ $F$ atoms ($MgF_2$ has $1$ $Mg$ and $2$ $F$ atoms).

Answer:

$1$ $Mg+1$ $F_2
ightarrow1$ $MgF_2$