Question

All compounds are molecules; but, all molecules are not compounds. Why?

Answer 1

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A compound is a substance that results from a combination of two or more different chemical elements, in such a way that the atoms of the different elements are held together by chemical bonds and atoms combine in a fixed ratio. The compound is made up of by combining so many molecules.

A molecule is formed when two or more atoms join together chemically. Combining atoms may refer to same element or different elements.

For example, water ($\sf{H_{2}O}$) is a compound which contains so many water molecules.

And one water molecule is formed by chemical combination of 2 atoms of hydrogen and one atom of oxygen.

Answer 2

Answer:

Because compound is made up of two or more then two element and molecules is made up of one kind of atom