2 Mg⁰ + O₂⁰ → 2 Mg^IIO^-II

This is an oxidation-reduction (redox) reaction:

2 Mg⁰ - 4 e^- → 2 Mg^II (oxidation)

2 O⁰ + 4 e^- → 2 O^-II (reduction)

Change the oxidation states

Search by reactants (Mg, O₂)

1 2
1.	Mg + O2 → MgO
2.	Mg + O2 → MgO2
3.	Mg + O2 → Mg2O
4.	Mg + O2 → Mg2O2
5.	Mg + O2 → MgO3
6.	Mg + O2 → Mg2O7
7.	Mg + O2 + H2O → Mg(OH)2
8.	Mg + O2 → OMg
9.	Mg + O2 → e + MgO
10.	Mg + CO2 + O2 → MgCO3
1 2

Search by products (MgO)

1 2 3 4 5 6 7 8 9 10
1.	Mg + O2 → MgO
2.	Mg + H2O → MgO + H2
3.	Mg + SiO2 → MgO + Si
4.	Mg(NO3)2 → MgO + O2 + NO2
5.	Mg3N2 + H2O → MgO + NH3
6.	MgCO3 → MgO + CO2
7.	B2O3 + Mg → MgO + B
8.	Mg + CO2 → MgO + C
9.	Mg + Fe2O3 → MgO + Fe
10.	Mg + Cr2O3 → Cr + MgO
1 2 3 4 5 6 7 8 9 10

Search by reactants (Mg, O₂) and by products (MgO)

1.	Mg + O2 → MgO
2.	Mg + O2 → e + MgO
3.	Mg + N2 + O2 → Mg3N2 + MgO
4.	(NH4)2Cr2O7 + Mg + O2 → MgO + N2 + Cr2O3 + H2O