किसी तत्व के परमाणु की दूसरी कक्षा मे इलेक्ट्रॉनिक विन्यास स्थायी है ? - Is the electronic configuration stable in the second orbit of an atom of an element? - Kisi Tatv Ke Parmanu Ki Doosri Kakshaa Me Electronic Vinyas Sthayi Hai ? General Science in hindi, Physics 32 question answers in hindi pdf 18 questions in hindi, Know About 8 General Science online test General Science notes in hindi quiz book 2
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