1. Justify the position of Hydrogen in the periodic table.
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Explanation:
Hydrogen is the first element of the periodic table. Its electronic configuration is [1s 1 ]. Due to the presence of only one electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it resembles both alkali metals and halogens.
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hydrogen is Nor metal neither non metal so its position is not described it is present on the top of the periodic table which is not considered in the group 1.
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