The region where an electron is most likely to be found is called its:

1. Electrons are not on fixed tracks around the nucleus. 2. They occupy regions of probability instead. 3. The area where an electron is most likely to be found is called its orbital. 4. Orbitals of the same energy are grouped into subshells labelled s, p, d and f. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 2 'The Chemical Foundation of Life', sections 2.1-2.3_