Learning the Ions

Positive Ion
Cation
Negative Ion
Anion
What is an Ion?
An atom or group of atoms with a charge
Monoatomic Ion
Single atoms with a charge
Polyatomic Ion
Group of atoms with a charge
Group IA/1
Alkali Metals, +1 Charge
Group IIA/2
Alkaline Earth Metals, +2 charge
Group IIIA/13
Charge of +3
Group VA/15
Charge of -3
Group VIA/16
Charge of -2
Group VIIA/17
Halogens, Charge of -1
Group VIIIA/18
Noble Gases, don’t form ions
Multivalent Elements
Elements with potential to form ions with different Ions
Roman Numeral
Representative of positive charge on Ion
Elements that get Roman Numerals to describe Ions
Transition Metals, Rare Earths, Sn, Pb, Bi
Exceptions to Roman Numeral rule: Ag
Silver, always +1

Exceptions to Roman Numeral rule: Sc

;

Scandium, always +1

Exceptions to Roman Numeral rule: Zn

;

Zinc, always +2
Naming Positive Ions: Au+3
Same as name of element, Gold (III)
Naming Negative Ions: Cl-1
Negative Ion gets ending “-ide”, Chloride
Polyatomic Ions
Groups of Ions that act as unit
NO3-1
Nitrate
SO4-2
Sulfate
CO3-2
Carbonate
C2H3O2-1
Acetate
PO4-3
Phosphate
ClO3-1
Chlorate
“ite”/”ate” rule
For every “-ate” ion, there is an ion with 1 less O atom (same charge) that ends “-ite”
NH4+1
Ammonium
CN-1
Cyanide
CrO4-2
Chromate
Cr2O7-2
Dichromate
MnO4-1
Permanganate
OH-1
Hydroxide
O2-2
Peroxide
C2O4-2
Oxalate
S2O3-2
Thiosulfate
Hydrogen addition rule: HCO3-1
Name change when Hydrogen is added to Ion: Hydrogen carbonate or BiCarbonate

Halogen Oxygen rule:

+1 O

-1 O

-2 O

Different names for more/fewer O atoms

Per-ion-ate

ion-ite

hypo-ion-ite

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