हिंदी

At the time of Mendeleev, the number of elements known was ______

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प्रश्न

At the time of Mendeleev, the number of elements known was ______ 

विकल्प

  • 63

  • 65

  • 62

  • 64

MCQ
रिक्त स्थान भरें
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उत्तर

At the time of Mendeleev, the number of elements known was 63.

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