Final answer:
The true statement is that a compound has different properties from each of its elements. This reflects the nature of compounds in chemistry, exemplified by how sodium chloride has properties different from sodium and chlorine.
Step-by-step explanation:
The true statement among the options provided is B: A compound has different properties from each of its elements. This is a fundamental principle in chemistry, as compounds are substances formed when two or more elements are chemically bonded together. The properties of a compound are unique and can be vastly different from the properties of the elements that make it up. For example, sodium is a reactive metal and chlorine is a poisonous gas, but when combined, they form sodium chloride (table salt), which is essential for human life and has entirely different properties.
Organic carbon is not found in all non-living things, and water is made of hydrogen and oxygen, not carbon and oxygen. Also, not all hydrogen compounds are the most common compounds on Earth, so options A, C, and the incomplete option D are incorrect.