1. Two or more elements bonded together and acting as one ion
Polyatomic Ions
Two or more elements bonded together and acting as one ion

3. The charge is for the whole polyatomic ion,
not just the last element.
Ex: OH- (hydroxide)
Oxygen needs 2 to complete the octet,
has 2- ionization number
Hydrogen has one electron to give away,
has 1+ ionization number
(2-) + (1+) = so hydroxide is OH-

4. -ite vs -ate NO2- nitrite NO3 - nitrate SO3 2- sulfite SO4 2- sulfate
ite has fewer oxygens
NO nitrite
SO sulfite
ate has more oxygens
NO nitrate
SO sulfate

5. Naming the ate ions NICK the CAMEL Ate CLAM for SUPPER in PHOENIX
Underlined letter is the symbol
Number of consonants is the number of oxygens
Number of vowels is the number of the negative charge on the ion

6. NICK NO3 - nitrate N = nitrogen 3 consonants = oxygens
1 vowel = charge
NO nitrate

7. CAMEL CO3 2- carbonate C = carbon 3 consonants = oxygens
2 vowels = charge
CO carbonate

8. CLAM Cl3 - chlorate Cl = chlorine 3 consonants = oxygens
1 vowel = charge
Cl chlorate

9. SUPPER SO4 2- sulfate S = Sulfur 4 consonants = oxygens
2 vowels = charge
SO sulfate

10. PHOENIX
P = phosphorus 4 consonants = oxygens 3 vowels = charge PO4 3- phosphate