किसी रेडियों सक्रिय तत्व से उत्सर्जित उल्फा किरण का द्रव्यमान 6.645x10⁻²⁷ किग्रा होता है , जो बराबर है ? - The mass of an ULFA ray emitted from a radioactive element is 6.645×10⁻²⁷ kg, which is equal to? - Kisi Radion Sakriya Tatv Se Utsarjit ulpha Kiran Ka Dravyamaan 6.645x10⁻²⁷ KG Hota Hai , Jo Barabar Hai ? General Science in hindi, Chemistry Negative Roop Se Aaveshit Kann Ke question answers in hindi pdf Helium Nabhik Ke questions in hindi, Know About Hydrogen Nabhik Ke General Science online test General Science notes in hindi quiz book Neutron Ke