CP Chemistry Practice & Review Links 

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TGIF Quizzes
  
 
   
 




Tips for Learning Ions



 
 
 
Negative Ions  - Anions
Examples
monatomic anions have "ide" ending 
Anion Element
nitride nitrogen
sulfide sulfur
chloride chlorine
bromide bromine
 
monatomic ions in column 7 on Pd Table have -1 charge 
monatomic ions in column 6 have -2 charge 
monatomic ions in column 5 have -3 charge
F-1, Cl-1, Br-1
O-2, S-2
N-3,P-3
anions ending in "ate" have one more oxygen than "ite"
sulfate,  SO4-2 nitrate, NO3-1
sufite, SO3-2 nitrite, NO2-1
 
Positive Ions - Cations
Examples
elements and ions have the same name 
must be differentiated by context
Na = sodium 
Na+1 = sodium
The only common polyatomic cation is ammonium ammonium = NH4+1
Cations in column 1 on Pd Table have charge of +1 
Cations in column 2 have charge of +2 
Cations in column 3  have charge of +3
K+1, Na+1
Ba+2,Mg+2
Al+3
Metals in transition block must be memorized. 
Some metals may have more the 1 possible charge.  When this is the case, the "ic" ending is used on the higher charge and the "ous" ending is used on the lower.
cupric +2 ferric +3
cuprous +1 ferrous +2
 

monatomic ions - literally means ions of one atom (examples Br-1, S-2, K+1)
polyatomic ions - ions consisting of multiple atoms (examples OH-1, SO3-2, NH4+1)