Balance the following Na+02-→ Na20
Al+O2 ->Al2O3
H2+12+ ->HI
Mg+H2O → Mg(OH)2+H2
Ca+O2 -> Cao

1. Na + O2 → Na2O (Balanced)

2. 4Al + 3O2 → 2(Al2O3) (Balanced)

3. H2 + i2 → 2HI (Balanced)

4. Mg + 2H2O → Mg(OH)2+ H2 (Balanced)

5. 2Ca +O2 → 2CaO (Balanced)

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

indium, and thallium have three electrons i think