Question

a compound is the
a. smallest particle of an element.
b. partially blurred, likely related to two or more elements
c. physical union of two or more substances.
d. smallest particle of a mixture.
e. smallest particle of an atom.

Explanation:

To determine the correct option, we analyze each choice:

• Option A: The smallest particle of an element is an atom, not a compound. Eliminate A.
• Option B: A compound is defined as a substance made up of two or more different elements chemically combined. This matches the definition of a compound.
• Option C: A physical union of two or more substances is a mixture, not a compound. Compounds involve chemical bonding. Eliminate C.
• Option D: A mixture does not have a "smallest particle" in the same defined way as a compound, and compounds are not related to being the smallest particle of a mixture. Eliminate D.
• Option E: The smallest particle of an atom is a subatomic particle (like protons, neutrons, electrons), not a compound. Eliminate E.

Answer:

B. substance made up of two or more elements (assuming the full option text is "substance made up of two or more elements" as the partial text suggests this is the correct definition - the exact wording might be "substance made up of two or more elements chemically combined" but from the partial view, this is the correct option among the choices).