what is the valency of ozone
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Ozone = O3
In chemistry, valence, also known as valency or valency number, is a measure of the number of chemical bonds formed by the atoms of a given element.
Ozone has three oxygen atoms with a double bond and a single bond between the O atoms.
The oxygen atom in the center makes 3 bonds (1 single and 1 double bond), so its valance = 3
The oxygen atom double bonded to the central O atom has a valance = 2
The oxygen atom single bonded to the central O atom has a valance = 1
However, experimental evidence proves that the bonds on either side of the central oxygen atom are identical.
3 bonds shared equally in 2 places means the valence of each oxygen = 1.5
This is resonance bonding. Valance or oxidation numbers do not work well in the case of resonance bonding
The paragraph below came from Wikipedia
The number of bonds formed by a given element was originally thought to be a fixed chemical property and in fact, in many cases, this is a good approximation. For example, in many of their compounds, carbon forms four bonds, oxygen two and hydrogen one. However it soon became apparent that, for many elements, the valence could vary between different compounds. One of the first examples to be identified was phosphorus, which sometimes behaves as if it has a valence of three and sometimes as if it has a valence of five. One method around this problem is to specify the valence for each individual compound: although it removes much of the generality of the concept, this approach has given rise to the idea of oxidation numbers (used in Stock nomenclature) and to lambda notation in the IUPAC nomenclature of inorganic chemistry.
In chemistry, valence, also known as valency or valency number, is a measure of the number of chemical bonds formed by the atoms of a given element.
Ozone has three oxygen atoms with a double bond and a single bond between the O atoms.
The oxygen atom in the center makes 3 bonds (1 single and 1 double bond), so its valance = 3
The oxygen atom double bonded to the central O atom has a valance = 2
The oxygen atom single bonded to the central O atom has a valance = 1
However, experimental evidence proves that the bonds on either side of the central oxygen atom are identical.
3 bonds shared equally in 2 places means the valence of each oxygen = 1.5
This is resonance bonding. Valance or oxidation numbers do not work well in the case of resonance bonding
The paragraph below came from Wikipedia
The number of bonds formed by a given element was originally thought to be a fixed chemical property and in fact, in many cases, this is a good approximation. For example, in many of their compounds, carbon forms four bonds, oxygen two and hydrogen one. However it soon became apparent that, for many elements, the valence could vary between different compounds. One of the first examples to be identified was phosphorus, which sometimes behaves as if it has a valence of three and sometimes as if it has a valence of five. One method around this problem is to specify the valence for each individual compound: although it removes much of the generality of the concept, this approach has given rise to the idea of oxidation numbers (used in Stock nomenclature) and to lambda notation in the IUPAC nomenclature of inorganic chemistry.
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valency is 3.........
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