Hydrogen : Class 11
Hydrogen: Class 11 hydrogen Position of Hydrogen in the Periodic Table: Hydrogen is similar to both G1 (Alkali metals) and G17 (Halogens) elements in the periodic table. Hence it is not right to keep H either in G1 or G17 of the periodic table. Similarity with Alkali metals and Halogens : Hydrogen is similar to alkali metals, which lose one electron to form unipositive ions. Also, hydrogen is similar to halogens which gain one electron to form uninegative ions. Dissimilarity with Alkali metals and Halogens Unlike alkali metals, H has a very high ionization enthalpy and does not possess metallic characteristics under normal conditions. In terms of reactivity, it is very low as compared to halogens. Isotopes of hydrogen : Ø 1 H 1 : Protium , Most abundant in nature Ø 2 H 1 : Deuterium (D), Component of heavy water. Ø 3 H 1 : Tritium (T) , Radioactive in nature Dih...