The octahedral complex [Co(H2O)6]3 has an absorption at 549 nm. Based on this where do you think the absorption will be for [Co(NH3)6]3 might be

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Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.