Is a compound simply a mixture of two or more elements explain?

Compound is a subset of pure substance that is a combination of two or more elements with fixed ratio. Hence, it is incorrect to simply say that the compound is merely a combination or mixture of two or more elements, rather it is more correct to refer to compound as a pure substance with elements connected to each other through different kinds of bonds and are present in fixed ratio. 

Molecule 1

Explanation:

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Correct me if i'm wrong pal