Answer: Shells around the nucleus.
- A The nucleus in the majority of cases studied
- B Shells around the nucleus
- C Protons as widely reported
- D Neutrons in standard practice
Correct answer: B. Shells around the nucleus
Explanation: Electrons occupy shells or energy levels around the nucleus.
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.