関連ワード:  the nucleus of an atom is surrounded by a(n) .........    the nucleus of an atom is surrounded by negatively charged particles called    the nucleus of a neutral potassium atom is surrounded by    the nucleus of a neutral potassium atom is surrounded by blank blank    the nucleus of a neutral potassium atom is surrounded by how many electrons  
結果 : the nucleus of an atom is surrounded by a(n) .........