General Science- Radion Sakriya Padarth Utsarjit Karta Hai ?

Q.10865: रेडियों सक्रिय पदार्थ उत्सर्जित करता है ?
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रेडियों सक्रिय पदार्थ उत्सर्जित करता है ? - Radies emit active substances? - Radion Sakriya Padarth Utsarjit Karta Hai ? General Science in hindi,   Beeta Kirne question answers in hindi pdf  Gama Kirne questions in hindi, Know About Alpha Kirne General Science online test General Science notes in hindi quiz book    Ye Sabhi