Question

/ Characteristics of the groups and periods in the modern periodic table are because of the ……… of the elements. *
अणुवस्तुमानां / Atomic Mass
संयुजा-इलेक्ट्रॉनच्या संख्ये/ valence electrons
इलेक्ट्रॉन संरूपणा / electronic configuration
अणूच्या त्रिज्ये / atomic radius

Answer 1

valence electrons 2 once.

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