Question

which is the smallest possible particle of an element?
○ molecule
○ atom
○ compound
○ matter

Explanation:

• A molecule is a group of atoms bonded together, so it's not the smallest particle of an element.
• An atom is the smallest unit of an element that retains the chemical properties of that element.
• A compound is a substance made of two or more different elements chemically combined, so it's not the smallest particle of a single element.
• Matter is anything that has mass and takes up space, which is a broad term and not a specific particle of an element.

Answer:

B. atom