Why can we put hydrogen in 1 or 17 group

1.	Why can we put hydrogen in 1 or 17 group
Answer» Belongs to helogen , hydrogen can be place in 1 and 17 grouo, it makes bond both in 1 and 7 group and complete its frequency Hydrogen can be kept in group 1 as it has one valence electon in its outermost shell .It can be kept in 17th group as it has also need of one electon as halogens.thank u guys. Did it helped u.? Hydrogen is special, in a sense that it behaves both as group I and group 17 (halogen) because it can accept as well as reject an electron to attain stable configuration. Because it is metal or non metal both

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