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Question

Justify the position of Hydrogen in the periodic table

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Solution

  • Atomic number of hydrogen is 1. ​

  • ​So, a hydrogen atom has only one electron in the valence shell. Elements belonging to group 1 have 1 valence electron.

  • Elements having only 1 shell belong to the first period.​

  • Therefore, Hydrogen belongs to the first group and first period of the periodic table


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