is a molecule composed of many atoms with a fixed ratio
Answer
Compound
Compound is a molecule composed of many atoms with a fixed ratio
This means that compounds will always exist as molecules, not separate atoms
Explanation
Compound is a substance made from two or more elements which consists of a fixed ratio of chemically bonded atoms which also happens in such a way that the atom s of the different elements are held together by chemical bonds that are difficult to break. This again means that compounds will always exist as molecules, not separate atoms