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फाइंड द स्क्वायर रूट ऑफ 1089/3481 |
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Answer» Step-by-step explanation: Hydrogen is the chemical ELEMENT with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the PERIODIC table. Hydrogen is the most abundant chemical substance in the universe, CONSTITUTING roughly 75% of all BARYONIC mass. |
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