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Chemistry - Chap 7

Section 2 - Oxidation Numbers

QuestionAnswer
In order to indicate the general distribution of electrons among the bonded atoms in a molecular compound or a polyatomic ion what are assigned Oxidation numbers also called oxidation states are assigned to atoms composing the compound or ion
The number of electrons that must be added to or removed from an atom in a combined state to convert the atom into the elemental form Oxidation number
the condition of an atom expressed by teh number of electrons taht the atom needs to reach its elemental form Oxidation state
What is the difference between ionic charges and oxidation numbers Oxidation numbers do not have an exact physical meaning.
How are oxidation numbers useful They are useful in naming compounds,in writing formulas, and in balancing chemical equations.
The atoms in a pure element have an oxidation number of what Zero
The more-electronegative element in a binary molecular compound is assigned what The number equal to the negative charge it would have as an anion.
The less-electronegative atom is assigned what The number equal to the positive charge it would have as a cation
Fluorine has an oxidation number of -1 in all of its compounds because it is the most electronegative element.
Oxygen has an oxidation number of -2 in almost all compounds.
Hydrogen has an oxidation number of +1 in all compounds containing elements that are more electronegative tahn it.
Hydrogen has an oxidation number of what in compunds with metals. -1
The algebraic sum of the oxidation number of all atoms in a neutral compound is equal to zero
The algebraic sum of the oxidation numbers of all atoms in a polyatomic ion is equal to the charge of the ion
A monatomic ion has an oxidation number equal to The charge of the ion
Oxidation numbers alone cannot be used to prove what The existence of a compound
What can be used as an alternative to teh prefeix system for naming binary molecular compounds Stock System
What is the oxidation number for : HCI +1, -1
What is the oxidation number for : CF4 +4, -1
What is the oxidation number for : PC3 +3, -1
What is the oxidation number for : SO2 +4, -2
Created by: tbstinso