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Why is Hydrogen placed above Alkali Metals in Periodic Table, when it is a non-metal?? |
| Answer» The first element in the periodic table is hydrogen.Here are some reasons for the position of hydrogen:It resembles alkali metals and halogens.\tIt has one electron in the valence shell.\tLike alkali metals,H forms positive hydrogen.\tIt forms oxides,sulphides and halides.\tIt acts as reductant.\tIn HALOGENS,it is diatomic.\tIonisation potentialvalue of H is much nearer to those ionisation potential values of halogens.\tIt is non-metal. | |