Question

In modern periodic table why is hydrogen there on both sides .
Do not search answers on internet as i already checked.
I know which will be frm net so be careful .
Refer the txt book if u want

Answer 1

It is simple.

Hydrogen has valency one.May be same with both group 1 and 17.

It has ns1 electronic configuration similar to group 1.

It has a tendency to gain one electron,which resembles with halogen.

Other properties like,electro positive nature,oxidation state are also there,but I can remember these at this instant.

Thanks.
Tripathy

Answer 2

here is your answer beautiful.

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Hydrogen have no fixed place in modern periodic table because it's valency is 1 which make it's she'll to gain or loss it's outermost electron.

we know that if any element gain electrons it should be considered as non metal and if it loss then it should be considered as metal.

Hydrogen is the only element which have the tendency to loss or gain it's electron. this makes hydrogen to show the property of both metal as well as halogens