I have to put the correct complete and balanced equation for

Li(s) + N2(g)
Li(s) +N2(g) --- LiNi2(s)

I think I'm correct what do you think

I don't think so. I think lithium nitride has the formula Li3N.

Li(s) + N2(g) ==> Li3N(s)
I'll leave it for you to balance.

Li(s) + N2

6Li(s) + N2 ==> 2 Li3N

Li =6. Li =6
N= 2. N =2

ok now

To determine if your balanced equation is correct, we need to go through the process of balancing it step by step. Here's how to do it:

1. Start by writing down the reactants and the products:
Li(s) + N2(g) → LiNi2(s)

2. Next, count the number of atoms on each side of the equation. On the left side (reactants), we have 1 Li atom and 2 N atoms. On the right side (products), we have 1 Li atom and 2 N atoms. So far, the number of atoms of each element is balanced.

3. Now, consider the charge. Since lithium (Li) is a metal, it does not carry a charge. Therefore, the charge is balanced.

4. At this point, we can see that the equation is indeed already balanced.

In summary, your balanced equation is correct:
Li(s) + N2(g) → LiNi2(s)