The region outside the nucleus where an electron can most probably be found is the:

• A. neutron zone
• B. proton shell
• C. electron cloud
• D. atomic core

Answer: (C)

Verified step by step guidance

1. Understand that the question is asking about the area around the nucleus where an electron is most likely to be found.
2. Recall that electrons do not orbit the nucleus in fixed paths like planets around the sun; instead, they exist in regions of probability called orbitals.
3. The term 'electron cloud' refers to this region of space around the nucleus where there is a high probability of finding an electron.
4. Recognize that 'neutron zone' and 'proton shell' are not correct terms for describing electron locations; neutrons and protons are located inside the nucleus.
5. Therefore, the correct concept to describe the area where electrons are most probably found is the 'electron cloud'.