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प्रश्न
In Dobereiner’s triads, the atomic weight of the middle element is ______ the of the atomic masses of 1st and 3rd elements.
रिकाम्या जागा भरा
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उत्तर
In Dobereiner’s triads, the atomic weight of the middle element is the average of the atomic masses of 1st and 3rd elements.
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