choice: atom nucleus
choice: atom electron
choice: atom charge
choice: atom attracts
choice: atom revolves
choice: atom electromagnetism
choice: nucleus electron
choice: nucleus charge
choice: nucleus attracts
choice: nucleus revolves
choice: nucleus electromagnetism
choice: electron charge
choice: electron attracts
choice: electron revolves
choice: electron electromagnetism
choice: charge attracts
choice: charge revolves
choice: charge electromagnetism
choice: attracts revolves
choice: attracts electromagnetism
choice: revolves electromagnetism