Yes, a mixture could be made up of only elements and no compounds, given that the elements never undergo a chemical interaction and stay only in physical contact with each other.
A compound is a substance bond between two or more different atoms, giving it a molecule. Substances within a composite can be really separated from each other as they nevermore respond chemically with one another. A mixture can have a mix of elements and mixtures or just a series of one or the other. So yes a mixture be made up of only elements and no compounds.
