Chemistry · Periodic Classification of Elements
निम्नलिखित में से तत्वों का कौन सा समूह डोबेराइनर त्रिक (Dobereiner's triad) बनाता है?
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- 1B(10.8), Al(27.0), Ga(69.7)
- 2Li(6.9), Na(23.0), K(39.1)✓
- 3N(14.0), P(30.9), As(74.9)
- 4F(19.0), Cl(35.5), Br(79.9)
सही उत्तर देखें
Li(6.9), Na(23.0), K(39.1)
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