General Science- Pratyek Awart Ka Pratham Sadasya Hota Hai ?

Q.11289: प्रत्येक आवर्त का प्रथम सदस्य होता है ?
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प्रत्येक आवर्त का प्रथम सदस्य होता है ? General Science in hindi,   Ek Hallogen question answers in hindi pdf  Ek akreey Gas questions in hindi, Know About Ek Kshar Dhatu General Science online test General Science notes in hindi quiz book    Ek updhatu

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