Choice 1) Has 3 Mg one one side of the equation and 2 on the other, NOT the answer.
Choice 2) has 2Mg and 2O on each side, it is balanced
Choice 3) 4N on one side and 2N on the other, NOT the answer
Choice 4) 4N on one side and 1N on the other, NOT the answer
Please be more clear how you format the question in Brainly, could barely read it
Answer: 2Mg + O2 -----> 2MgO
Explanation:
For an equation to be balanced, the number of atoms of each element on the left hand side of the equation must be equal to the number of atoms of each element on the right hand side of the equation.
Only this equation,
2Mg + O2 -----> 2MgO, meets that criteria.
Left hand side,
Mg =2, O =2.
Right hand side ,
Mg = 2, O =2
The equation is balanced.
