Respuestas
Respuesta:
Elemento: Zn ( C I O )
Número de oxidación: +2 0 +7 -2
The oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. The oxidation number is synonymous with the oxidation state. Determining oxidation numbers from the Lewis structure (Figure 1a) is even easier than deducing it from the molecular formula (Figure 1b). The oxidation number of each atom can be calculated by subtracting the sum of lone pairs and electrons it gains from bonds from the number of valence electrons. Bonds between atoms of the same element (homonuclear bonds) are always divided equally.
Different ways of displaying oxidation numbers
Figure 1. Different ways of displaying oxidation numbers of ethanol and acetic acid. R is an abbreviation for any group in which a carbon atom is attached to the rest of the molecule by a C-C bond. Notice that changing the CH3 group with R does not change the oxidation number of the central atom. → Descarga imagen en alta calidad
When dealing with organic compounds and formulas with multiple atoms of the same element, it's easier to work with molecular formulas and average oxidation numbers (Figure 1d). Organic compounds can be written in such a way that anything that doesn't change before the first C-C bond is replaced with the abbreviation R (Figure 1c). Unlike radicals in organic molecules, R cannot be hydrogen. Since the electrons between two carbon atoms are evenly spread, the R group does not change the oxidation number of the carbon atom it's attached to. You can find examples of usage on the Dividir la reacción redox en dos semirreacciones page.
Explicación:
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