Question

Is this true or false--> Each element has a unique set of properties. _____ 2. The idea of elements was first introduced by John Dalton. _____ 3. Most elements are found in compounds. _____ 4. A compound has the same properties as the substances it contains. _____ 7. The substances in a mixture may be elements or compounds. _____ 8. A package of mixed seeds is a homogeneous mixture. _____ 9. Mixtures are classified on the basis of particle size. _____ 10. Components of mixtures rarely can be separated.

Answer 1

1. Each element has a unique set of properties. FALSE
2. The idea of elements was first introduced by John Dalton. FALSE
3. Most elements are found in compounds. TRUE
4. A compound has the same properties as the substances it contains. FALSE
5. The substances in a mixture may be elements or compounds. TRUE
6. A package of mixed seeds is a homogeneous mixture. FALSE
7. Mixtures are classified on the basis of particle size. TRUE
8. Components of mixtures rarely can be separated. FALSE