Balance the equation by putting the correct number in front of each compound. you can work this out mathematically or by drawing pictures on a piece of paper like the videos.

mg + p4--> mg3p2

magnesium will react with phosphorus to form magnesium phosphide

6Mg + P4 --> 2Mg3P2

I first balanced the Phosphorous on the right side to match the left. So by multiplying the right side equation by two we then received 4 Phosphorous. But that left us with 2 x 3 Magnesium on the right side. So to balance we added 6 to the left.

i don't know people like to fight everywhere rip.