Give two reason in support of keeping hydrogen in the first group and one reason against of it... Please tell...
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supporting answer : hydrogen is the first element in the periodic table because it's atomic number is 1, and it has only one electron in its valence shell.
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It is placed in first place because hidrogen is single protone without any electron and neutron . it's atomic mass is one protone.
It acts like alkalines in reactions with non-metals and has /-1/0/+1/ oxidation states.
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