Why we collect hydrogen after all yhe air in the apparatus is allowed to escape ?
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Hydrogen, H2, is the simplest element. It is the first element in the periodic table, and it is placed in Group I of the periodic table. Some previous attempts have been made to classify hydrogen as Group 1 (Alkali metal) or as group 7 (halogen), but neither were satisfactory.
Hydrogen is the lightest element and the most abundant element in the universe.Its atom consists of just a proton and an orbiting electron. Without hydrogen we would not be here; all organic compounds making up living things contain hydrogen and it is also a constituent of water, necessary for all known life.Hydrogen is therefore arguably the most important element for life.
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