Question

classify each of these statements as always true at, sometimes true st, or never true nt. 10. st heating a chemical compound produces elements. 11. compounds can be broken down into elements by physical means. 12. an element is the simplest form of matter that has a unique set of properties. 13. at compounds are represented by chemical formulas.

Explanation:

1. Compounds can only be broken down into elements by chemical means, not physical means, so it is never true (NT).
2. By definition, an element is the simplest form of matter with a unique set of properties, so it is always true (AT).

Answer:

1. NT
2. AT