Chemistry · Periodic Table
निम्नलिखित में से किस तत्व की परमाणु संख्या 8 है?
- 1ऑक्सीजन✓
- 2कार्बन
- 3नाइट्रोजन
- 4हाइड्रोजन
सही उत्तर देखें
ऑक्सीजन
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