Nomenclature Ionic Compounds. Topics Ionic Nomenclature Standard Transition Metals (multivalent) Polyatomic Ions.

Nomenclature

Ionic Compounds

Topics

Ionic Nomenclature

StandardTransition

Metals(multivalent)

PolyatomicIons

Nomenclature

Latin: Nomen – name, Clature – to call

A standardized naming system. In this case, we are applying it to compounds. Ex.

NaCl = Sodium Chloride

Standard Ionic Nomenclature

All ionic bonds are formed between metals and non-metals.

Standard Ionic Bonds are formed between: Cations from group 1, 2, or 3

and Anions from group 15, 16, or 17

Example: NaCl Ca3P2

Standard continued…

Rules:The metal’s name remains the sameAdd the suffix “ide” to the name of the non-

metal.Name = Metal + Non-Metal + ideExample:

MgS = Magnesium SulfideLi2O = Lithium OxideCa3As2 = Calcium Arsenide

Standard Practice

Formula Name

LiH

MgCl2CaSe

Be3N2

NaI

Standard Practice

Formula Name

LiH Lithium Hydride

MgCl2CaSe

Be3N2

NaI

Standard Practice

Formula Name

LiH Lithium Hydride

MgCl2 Magnesium Chloride

CaSe

Be3N2

NaI

Standard Practice

Formula Name

LiH Lithium Hydride


CaSe Calcium Selenide

Be3N2

NaI

Standard Practice

Formula Name

LiH Lithium Hydride



Be3N2Beryllium Nitride

NaI

Standard Practice

Formula Name

LiH Lithium Hydride



Be3N2Beryllium Nitride

NaI Sodium Iodide

Transition Metals and Nomenclature

Transition metals are the elements in the “bridge” of the periodic table (groups 3-12)

SOME of the transition metals can form more than one type of ion. Therefore, we must find some way to indicate the charge of the ion in the name.

We use Roman Numerals

Roman Numerals

One - I Six - VI

Two - II Seven - VII

Three - III Eight - VIII

Four - IV Nine - IX

Five - V Ten - X

Transition Metals Continued…

Rules The name of the transition metals remains the

same The charge of the transition metal is indicated with

roman numeral in brackets The suffix “ide” is added to the name of the non-

metal. Name = Transition Metal + (Roman Numeral)

+ Non-Metal + ide Ex. [Au]3+ and [Cl]-

= AuCl3

= Gold (III) Chloride

Use the Criss-Cross Rule to discover the charge from the chemical equation.

Criss-Cross Rule and Finding Charges

Some chemical formulas do not directly indicate the charge of the transition metal. We need to work backwards to figure it out.

Ex: AuNWe know that Nitrogen forms an ion with a

charge of 3-Therefore, Gold must have a charge of 3+The name is then Gold (III) Nitride

Transition Metal Practice

FeF2

FeN

TiP

TiCl4

PdS


FeF2Iron (II) Flouride

FeN

TiP

TiCl4

PdS



FeN Iron (III) Nitride

TiP

TiCl4

PdS




TiP Titanium (III) Phosphide

TiCl4

PdS





TiCl4 Titanium (IV) Chloride

PdS





TiCl4 Titanium (IV) Chloride

PdSPalladium (II) Sulfide

Polyatomic Ions and Ionic Nomenclature

Polyatomic Ions are ions that are composed of more than one type of atom. Most are negative ions / metals. Ex. NH4

+

Rules: The name of the metal stays the same. The names of the polyatomic ions are provided on

the polyatomic ions chart. Their names do not change.

If the polyatomic ion is first in the compound (positive / metal), you must add the suffix “ide” to the non-metal).

Name = Metal + Polyatomic Ion or

Name = Polyatomic Ion + Non-Metal +ide

Polyatomic Practice

BeCrO4

LiCN

Ca(HSO3)2

(NH4)2S

Co(NO3)3

Polyatomic Practice

BeCrO4Beryllium Chromate

LiCN

Ca(HSO3)2

(NH4)2S

Co(NO3)3

Polyatomic Practice


LiCN Lithium Cyanide

Ca(HSO3)2

(NH4)2S

Co(NO3)3

Polyatomic Practice



Ca(HSO3)2Calcium Bicarbonate

(NH4)2S

Co(NO3)3

Polyatomic Practice




(NH4)2S Ammonium Sulfide

Co(NO3)3

Polyatomic Practice




(NH4)2S Ammonium Sulfide

Co(NO3)3Cobalt (III) Nitrate

Nomenclature Ionic Compounds. Topics Ionic Nomenclature Standard Transition Metals (multivalent) Polyatomic Ions.

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