Account for the following-
1.  Hydrogen is similar to both alkali and halogen 
2. How does H2O2 behave as a bleaching agent
3.  Draw the structure of H202  in gas phase

Dear Student,

The position of an element in a periodic table depends upon its electronic configuration and properties. Hydrogen resembles the elements of Alkali metals, Halogens in some respect, and differs in some other aspects,

Resemblance Of Hydrogen With Alkali Metals:-
1)Valence shell electronic configuration of hydrogen and alkali metal is same.
2)Like alkali metals, hydrogen has one electron in its valency shell.
3)Like alkali metals hydrogen can also form compounds with non-metals.
4)Halides of alkali metals and hydrogen ionized in similar way in aqueous solution
5)Both hydrogen and alkali metal are good reducing agents.

Resemblance Of Hydrogen With Halogens:-
1)
Both Hydrogen and Halogens require one electron to complete their valence shell.
2)Their molecules are diatomic
3)Like Halogens, hydrogen can also form both ionic and covalent bond.
4)Both hydrogen and Halogens are non-metals(Except Iodine has partiall metallic character in some case)

Disclaimer:-Please ask separate questions as different questions.
Hope this information will clear your doubts about topic.

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Regards:
~Chirag

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