Which statement best describes electrons in an atom?

• A. Electrons are negatively charged particles that occupy regions called orbitals around the nucleus.
• B. Electrons are positively charged particles found in the nucleus.
• C. Electrons are neutral particles that determine the atomic mass.
• D. Electrons are responsible for holding protons together in the nucleus.

Answer: (A)

Verified step by step guidance

1. Recall the basic structure of an atom: it consists of a nucleus containing protons and neutrons, and electrons that move around the nucleus.
2. Understand the charge of each subatomic particle: protons are positively charged, electrons are negatively charged, and neutrons are neutral.
3. Recognize that electrons do not reside inside the nucleus but occupy specific regions around it called orbitals, which are areas where there is a high probability of finding an electron.
4. Note that electrons are responsible for chemical behavior and bonding, but they do not contribute significantly to atomic mass, which is mainly due to protons and neutrons.
5. Conclude that the correct description of electrons is that they are negatively charged particles occupying orbitals around the nucleus.