The physical and chemical properties of elements are determined by the atomic structure. This, in turn, is determined by electrons and the shells, sub-shells and orbitals they reside in. The rules of placing electrons within shells is known as the Aafbau principle, which originally means ‘building up’.
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मातृभूमि: सोहनलाल द्विवेदी – भारत के प्राकृतिक सौंदर्य और समृद्धि पर हिंदी कविता
मातृभूमि कविता में कवि सोहनलाल द्विवेदी जी ने भारत के प्राकृतिक सौंदर्य और समृद्धि का …