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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen5 Marks
Question
Give reasons why hydrogen resembles alkali metals?
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Answer

Hydrogen resembles alkali metals, like Na, because of their similarity in electronic configuration. Both of them have 1 valence electron.
One more interesting fact that Hydrogen also resembles the elements of Group 17, that are halogens, because they can gain 1 electron and achieve noble gas configuration.
That is why position of Hydrogen is always a controversial point.
In modern periodic table the hydrogen is placed in group 1 but it is not attached to the other elements of that group.
See the periodic table in our NCERT book.
Hydrogen is not attached to other group 1 elements.

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