Bir Ma Ahe Bir Ma Ahe (ingiriis: Nonmetal) waa curiye kimiko kuwaas oo leh calaamado iyo astaamo ka duwan kuwa birta. Sida caadiga ah, curiyaha bir ma ahe waxaa lagu yaqaanaa waa kuwo si fudud u uumi baxa, si fudud loo kala jabin karo, iyo in aanay gudbinin kulka iyo korontada. Waxa sidoo kale lagu yaqaanaa curiyaha bir ma ahe markuu la falgalo walax kale inuu soo sii daayo awood ion aad u sareeysa, isla markaana ku daro ama la wadaago elektaroono curiyaha kale ama isku dhiska uu la falgalaayo. Si kastaba ha ahaatee, toban-iyo-todoba (17) curiye ayaa loo aqoonsadey bir ma ahe kuwaas oo inta ugu badan tahay neefo kala ah: Haydarojiin (H),Hiliyaam (He), Nitrojiin (N), Ogsajiin (O), Foloriin (F), Niyoon (Ne), Koloriin (Cl), Aargon (Ar), Kiribtoon (Kr), Siinoon (Xe) iyo curiyaha radioactiveka ah Raadhoon (Rn); hal curiye oo bir ma ahe ahi waa dareere Boromiin (Br); iyo xoogaa curiye adke ah sida Kaarboon (K), Fosforos (P), Salfar (S), Seleniyaam (Se), iyo Aaydhiin (I).