Is there any matter that is not combined to form a compound

The noble gases (e.g., neon) and noble metals (e.g., mercury) can also be found in their pure, non-bonded forms in nature. Still, most of these elements are found in mixtures. When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound.

a is the answer

explanation:

which statement about trans-fatty acids is false?

a. the conversion of cis-fatty acids to trans-fatty acids is inhibited by the presence of antioxidants.

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