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

ਟੈਟਰਾ-ਪਰਮਾਣੂ ਪਰਮਾਣੂ ਵਾਲਾ ਤੱਤ ______ ਹੈ।

1
ਹੀਲੀਅਮ
2
ਨਾਈਟ੍ਰੋਜਨ
3
ਫਾਸਫੋਰਸ
4
ਕਲੋਰੀਨ
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