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  1. Orbital | Chemistry, Physics & Applications | Britannica

  2. Orbital Definition & Meaning - Merriam-Webster

  3. The periodic table, electron shells, and orbitals - Khan Academy

  4. Shells, subshells, and orbitals (video) | Khan Academy

  5. Homepage - Orbital

  6. Atomic orbital - Wikipedia

  7. Orbital Definition and Example - ThoughtCo

  8. ORBITAL | English meaning - Cambridge Dictionary

  9. Orbital - Definition, Meaning & Synonyms | Vocabulary.com

  10. Orbital Definition & Meaning | Britannica Dictionary