When is a compound formed? a. When two or more substances are combined b. When two or more elements are chemically combined c. When materials undergo separation techniques d. When solutions are made
A compound is a unique substance that forms when two or more elements combine chemically. Compounds form as a result of chemical reactions. The elements in compounds are held together by chemical bonds. A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons.19
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Answer:
A