Wat is considered a compound of hydrogen and oxygen and not a mixture because hydrogen and oxygen have gone through a chemical process to form the compound h2O. A mixture can generally be easily separated whereas a compound must undergo another chemical process to separate its elements. Therefore to separate oxygen and hydrogen from water a chemical process is necessary.
Changes in energy and formation of new substances.
Answer:
Al2O3
Explanation:
Al2O3 has an ionic bond because the bonds between them are very strong
