(i) Name one halogen ,one metal ,and one 13 group element which is liquid at 30 o C. (ii) Compare the atomic size and ionization enthalpy of halogen group

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Catalysts and intermediateshope i

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A- electron repulsion favors a tetrahedral shape, so the orbitals are 109.5° apart from each other. of a hydrogen atom on methane. they may also contain lone pairs—this explains the geometry of water, which is sp3 hybridized due to the lone pair, which occupies one of the four hybrid orbitals.