Chemistry · Periodic Classification
समान गुण वाले तत्वों के किस जोड़े को मेंडलीफ की आवर्त-सारणी में अलग-अलग रखा गया था?
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- 1Cl और Br
- 2Ca और Sr
- 3Cu और Hg✓
- 4Na और K
सही उत्तर देखें
Cu और Hg
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