Teaching RSMSSB Lab Assistant (Science) 2022 Mock Test General Science Chemistry Classification of Elements and Periodicity in Properties

आवर्त सारणी के समूह 17 के तत्वों को क्या कहा जाता है?

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निक्टोजन
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हैलोजन
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चाल्कोजन
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उत्कृष्ट गैस
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