comment on position of hydrogen in periodic table
James11:
Its group is IA or VIIBand its period is 1
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it is the first element in the periodic table
1st Element 1st group 1st period
group IA or VIIB , period 1
that is right.
s block
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it is in the 1 element in the periodic table.
it's valency is 1.
it's valency is 1.
group 1 A , period 1... left top most element ... in S block.
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