Assigning Oxidation Numbers – Flashcards

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In a pure element the oxidation number is....
answer
0
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The oxidation number of a monotomic ion is...
answer

the same as its charge. Ex. Li+ = +1

  1. A monatomic ion is an ion consisting of a single atom. If an ioncontains more than one atom, even if these atoms are of the same element, it is called a polyatomic ion. For example, calcium carbonate consists of the monatomic ion Ca2+ and the polyatomic ion CO32-.
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The sum of all oxidation numbers in a compound is...
answer
0
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The sum of all oxidation numbers in an ion...
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Equals the charge of that ion.

Ion an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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When bonded to other elements, the oxidation number of F is ...
answer
-1
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In a binary salt involving a halogen, the oxidation number of the halogen is always...
answer
-1
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The oxidation of an alkaline metal when bonded to other elements is ...
answer
+1
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The oxidation numbers of all alkaline earth metal when bonded to other elements is...
answer
+2
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When bonded to other elements the oxidation number of Al is ...
answer
+3
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When bonded to other elements the oxidation number of Ag is...
answer
+1
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When bonded to other elements the oxidation number of zinc and cadmium are each...
answer
+2
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When bonded to other elements the oxidation number of Sc, Y and La are...
answer
+3
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The oxidation number of O when bonded to other elements is almost always...
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-2

exception is O22-. In peroxides the oxidation number of O is -1

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The oxidation number of H- when bonded with other elements is almost always ...
answer

+1

Exception is when hydrogen is bonded directly to a metal (hydrides) 

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question
In a pure element the oxidation number is....
answer
0
question
The oxidation number of a monotomic ion is...
answer

the same as its charge. Ex. Li+ = +1

  1. A monatomic ion is an ion consisting of a single atom. If an ioncontains more than one atom, even if these atoms are of the same element, it is called a polyatomic ion. For example, calcium carbonate consists of the monatomic ion Ca2+ and the polyatomic ion CO32-.
question
The sum of all oxidation numbers in a compound is...
answer
0
question
The sum of all oxidation numbers in an ion...
answer

Equals the charge of that ion.

Ion an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

question
When bonded to other elements, the oxidation number of F is ...
answer
-1
question
In a binary salt involving a halogen, the oxidation number of the halogen is always...
answer
-1
question
The oxidation of an alkaline metal when bonded to other elements is ...
answer
+1
question
The oxidation numbers of all alkaline earth metal when bonded to other elements is...
answer
+2
question
When bonded to other elements the oxidation number of Al is ...
answer
+3
question
When bonded to other elements the oxidation number of Ag is...
answer
+1
question
When bonded to other elements the oxidation number of zinc and cadmium are each...
answer
+2
question
When bonded to other elements the oxidation number of Sc, Y and La are...
answer
+3
question
The oxidation number of O when bonded to other elements is almost always...
answer

-2

exception is O22-. In peroxides the oxidation number of O is -1

question
The oxidation number of H- when bonded with other elements is almost always ...
answer

+1

Exception is when hydrogen is bonded directly to a metal (hydrides)