smallest unit that consists of at least one atom

A. Protons
B. Neutrons
C. Electrons
D. Molecules
Im thinking D but im not sure i don't remember.

Right, A, B and C are all parts of atoms.

PsyDAG, there's only one answer. Not A, B, and C.

The smallest unit that consists of at least one atom is a molecule. However, to recall and verify the correct answer more confidently, let's break down the options and understand their definitions:

A. Protons: Protons are positively charged particles found in the nucleus of an atom.
B. Neutrons: Neutrons are neutral particles found in the nucleus of an atom.
C. Electrons: Electrons are negatively charged particles that orbit around the nucleus of an atom.
D. Molecules: Molecules are formed when two or more atoms chemically combine.

Now, based on these definitions, we can conclude that the smallest unit that consists of at least one atom is a molecule (option D). This is because a molecule is formed by the chemical combination of two or more atoms.

So, your initial hunch was correct - the correct answer is D.