It is O with a little 2 subscript. it represents two atoms of oxygen.
The bond that are broken from the reaction would be ionic bonds. Calcium oxide and hydrochloric acid are held by ionic bonds so that these are also the bonds being broken and are being formed as well. Hope this answers the question.
Mixture. Mixtures can be separated into their component parts, while substances are chemically bonded atoms that can't be separated by physical means.
Answer: -
Oxidation, Oxygen
Explanation: -
Burning of magnesium gives us magnesium oxide.
The chemical symbol of magnesium is Mg.
The chemical symbol of magnesium oxide is MgO.
So, the balanced chemical equation is
2Mg + O2 – 2 MgO.
We see that the element added is O Oxygen.
So, the reaction is oxidation.
In oxidation always, oxygen is the common element involved in all chemical reactions of this kind.
The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.
