1)a. formation of gas
2)b.energy was transferred
3)c.substances that are used up in a reaction
Explanation:
i guess it's through thousands of research and experiments they conducted
Answer: emission spectrum
Explanation:
2MgO
This is called redox reaction. Oxygen is the oxidizing agent to receive 2 electrons from Mg.
Mg is the reducing agent to give 2 electrons to O.
Mg becomes Mg2+ and O becomes O2-. These 2 ions form an ionic structure called MgO