why hydrogen is placed in group 1?
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Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. ... Because hydrogen is a nonmetal and forms H- (hydride anions), it is sometimes placed above the halogens in the periodic table.15-Aug-2020
Atomic Weight: 1.0079
At Room Temperature: Colorless & Odorless Diatomic Gas
Electronic Configuration: 1s
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this is the cause for hydrogen
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