In the given molecular art options, option B and F are elements and option A, C, D and E are compounds.
Elements refer to pure substances which are composed of only one type of atom. It refers to a class of substances that cannot be separated into simpler substances by chemical means. In the given molecular structures, option B and F are elements as they made up of single type of atoms. Compounds refer to substances which are formed by two or more different types of elements that are united chemically in fixed proportions. When the elements combine together, they react with each other and form chemical bonds as a result of sharing or exchanging electrons between atoms which are difficult to break. As molecular structures, option A, C, D and E are made up of different type of atoms, they are compound.
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