Chemical Nomenclature Flashcards
the charge that an atom has or appears to have when certain arbitrary rules are applied
Oxidation Number/ Oxidation State
oxidation numbers are useful in identifying atoms that are…
oxidized or reduced
loss of electrons
oxidized
gain of electrons
reduced
Based on the first rule, when will any element have an oxidation number of zero
free state
Based on the second rule, what generally haves positive oxidation numbers
metals
Based on the third rule, what is the general oxidation number of hydrogen in a compound or an ion
+1
What is the exception to the third rule which has an oxidation number of -1
a metal hydride when hydrogen is second in the formula
Based on the fourth rule, the oxidaiton number of ____ in a compound or an ion is generally -2
oxygen
What is the exception to the fourth rule
peroxide where it is -1
Based on the fifth rule, the oxidation number of monoatomic ion is the same as the charge of an…
ion
Based on the sixth rule, the algebraic sum of the oxidation of numbers for all the atoms in a compound must equal…
zero
Based on the seventh rule, the algebraic sum of the oxidation numbers for all the atoms in a ______ must equal the charge on the ion
polyatomic ion
In the first step of finding the oxidation number for an element within a compound, where should the oxidation number of each known element be written?
below the atom in the formula
________ each oxidation number by the number of atoms of that element in the compound.
Multiply
Write an equation indicating the ___ of all oxidation numbers in the compound or ion.
Sum
Composed of metal cations and non-metal anions, or, polyatomic ions
Ionic Compounds
Names and formulas always start with the ______ cation
positively charged
Ions are combined in ratios so that the final ionic compound is…
neutral
Never use ___ in the names of the ionic compounds
prefixes
The cation name is simply combined with the _____ only
anion name
If the cation is capable of having more than one possible charge, the _____ is included in the name as a Roman numeral in brackets
cation charge
Using Roman numeral to indicate oxidation number
Stock System
In writing the formula of a compound the algebraic sum of the oxidation numbers should be equal to…
zero