Why hydrogen is in first place in periodic table.
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Answer:
because its atomic number is 1
Explanation:
Hydrogen have only one electron. ...Hydrogen is known to be the first element in the periodic table of elements. It has one proton in its nucleus and one outter electron
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Hydrogen is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than the other alkali metals.
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