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Order the structure: from atom down to electron

Exercise and reference answers

Steps
  1. The atom's electron distribution is divided into shells
  2. Each shell consists of one or more subshells
  3. Each subshell is composed of one or more orbitals
  4. Electrons occupy those orbitals

Explanation

The quantum mechanical model nests these one inside the next. Source: syllabus Chemistry Part I, Ch 2 Structure of Atom.
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