Answer: Outermost occupied shell.
- A Innermost shell
- B Outermost occupied shell
- C Nucleus
- D Shell with no electrons
Correct answer: B. Outermost occupied shell
Explanation: The valence shell is the outermost shell that contains electrons.
Bohr's model: electrons occupy fixed circular shells (K, L, M) around the nucleus, with each shell holding up to 2n2 electrons.
Concept context
Explore how electrons are arranged inside an atom. Covers Bohr's model, quantum numbers, Heisenberg's uncertainty principle, shapes of s, p, d orbitals, and electronic configuration rules.