I believe sir you made concept easier than school i always refferes your videos when I feel hard to learn, and end up with learning in easy way thank you so much sir 🙏
It's wrong because na has a valency of +1 and mg has a valency of +2 okay so when we combine you'll see that Na. Mg +1. +2 Cross multipy them and get Na(2)Mg(+1) And finally getting the answer as 2Na+Mg - Na2Mg+ Okay? 1.