Explanation:
Elements are pure substances made up of only atoms that all have the same number of protons in their nuclei. Compounds are molecules held together by covalent bonds. Ionic compounds are held together by ionic bonds. Intermetallic compounds are held together by metallic bonds. Certain complexes are held together by coordinate covalent bonds. A mixture is a combination of two or more elements or compounds which haven't bonded yet, so each mixture is it's own.
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