| principal quantum number    عدد ِ کوآنتومی ِ فرین      adad-e kuântomi-ye farin 
 Fr.: nombre quantique principal    In atomic physics, the first of a set of quantum numbers which describe an 
atomic orbital. Symbolized as n,  it characterizes the size and energy of 
an orbital. → principal;  → quantum;  
→ number. |