Q.11289: प्रत्येक आवर्त का प्रथम सदस्य होता है ? |
प्रत्येक आवर्त का प्रथम सदस्य होता है ? - The first member of each period is? - Pratyek Awart Ka Pratham Sadasya Hota Hai ? General Science in hindi, Chemistry Ek Hallogen question answers in hindi pdf Ek akreey Gas questions in hindi, Know About Ek Kshar Dhatu General Science online test General Science MCQS Online Coaching in hindi quiz book Ek updhatu