"Fly dragon occupies a unique position in Modern periodic table ".justify the statement.
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Hydrogen's unique position in periodic table
Explanation:
Hydrogen occupies a unique position in the Modern Periodic Table because of the following reasons:
(i) Number of valence electron in hydrogen is one. This is similar to other alkali metals with one electron in the outermost shell. So hydrogen is placed in Group 1 with alkali metals.
(ii) Hydrogen is similar to halogens as both have one electron less than the nearest inert gas configuration. So some of the properties of hydrogen are similar to those of halogens and hence it can be placed in Group 17 with halogens.
(iii) In some properties, hydrogen differs from both hydrogen and halogens. Oxide of hydrogen is H2O which is neutral, while oxides of alkali metals are basic and oxides of halogens are acidic.
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