Answer:
D
Explanation:
We are looking for a negatively charged particle that is part of the cloud around an atom. Let’s analyze each answer choice.
Neutrons are neutral, and they have no charge. Therefore, A is incorrect.
Protons have a positive charge, so B is also incorrect.
Proteins are not part of the atom or in the cloud that surrounds one, so choice C is wrong as well.
Electrons are negatively charged, and they are in the cloud that surrounds an atom. Therefore, D. Electrons is correct.
