compound or elements

___1.Categorized as acid,base or salt.
___2.Made up of two or more elements.
___3.Has constant chemical composition.
___4.Composed of only one kind of atom.
___5.Classified as metal, non metal or metalloids.
___6.Could not be broken down into simpler subtance.
___7.Could be be broken down into its component elements.
___8.Homogeneous or has uniform properties all throughout the sample.
___9.Cannot be saparated into two or more substances by physical or mechanical means.

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P.S. i will put your answer the brailiest if you answer all of that☝️thank u❤​