HYDROGEN - NCERT
HYDROGEN 285 possess metallic characteristics under normal conditions. In fact, in terms of ionization enthalpy, hydrogen resembles more with halogens, ∆i H of Li is 520 kJ mol –1, F is 1680 kJ mol–1 and that of H is 1312 kJ mol–1. Like halogens, it forms a diatomic molecule,
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