SSC SSC GD Constable 2025 Mock Test Series General Science Chemistry Structure of Atom

टेट्रा-परमाणु परमाणुकता वाला तत्व है-

1
हीलियम 
2
नाइट्रोजन 
3
फॉस्फोरस 
4
क्लोरीन 
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