Science · Periodic Table
निम्नलिखित में से कौन सी एक रेडियोधर्मी अक्रिय गैस है?
- 1नियोन (Ne)
- 2आर्गन (Ar)
- 3रेडॉन (Rn)✓
- 4हीलीयम (He)
सही उत्तर देखें
रेडॉन (Rn)
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