Ionic Nomenclature

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Ionic Nomenclature

• Lesson 7

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Nomenclature

• a branch of taxonomy concerned with the
  application of scientific names to taxa, based on
  a particular classification scheme and in
  accordance with agreed international rules and
  conventions

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IUPAC nomenclature 

• is a system of naming chemical compounds and for
  describing the science of chemistry in general.
  It is maintained by the International Union of
  Pure and Applied Chemistry.

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Ionic Binary Compounds IUPAC Naming

• Metal non-metal -ide

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Ionic Binary compounds

• A binary compound is one that only contains two
  elements in the compound. It may have multiple
  atoms of each element but can only have two
  elements.
• An ionic binary compound is a compound contains
  one metal and one non-metal. Either element may
  have multiple atoms but there can only be the two
  elements involved.

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Ionic Binary Compounds IUPAC Naming

• Consists of two types of monoatomic ions
• The metal ion is always written first and retains
  its whole name
• The non-metal is written second and has a slight
  change, the ending (suffix) is changed to ide
• Do not write ones (Ex Na1Cl1) and if both
  elements have the same number reduce to lowest
  terms (Ca2O2 CaO)

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Example

• Example
• Na Cl
• Use the cross over method Na Cl- NaCl
• sodium chlorine
• The metal name is written in full and the
  non-metal has the ide suffix added to it.
• Sodium chloride

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• Binary compounds can be made up of more than two
  ions, provided that there are only two types of
  elements. Example Al2O3
• STUDY TIP All metals in group 1 and 2 follow
  periodic law. Check all the others metals when
  naming.

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Practice

• Work on the problems given on the sheet.

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Ionic Multivalent Binary Compounds

• A multivalent compound is one that may have
  varied numbers of electrons in its valence shell.
  This occurs with elements that fall outside of
  the representative elements. The transition
  metals are elements that commonly have multiple
  valence shell electrons.
• This means that they can form compounds in
  various proportions.

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• Example Copper Oxygen
• Copper and oxygen could have two different
  formulas with two completely different
  properties.
• CuO and Cu2O
• In order to differentiate the two compounds we
  must use a different method to name them to avoid
  confusion.

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Ionic Multivalent Binary Compounds IUPAC Naming

• Metal (charge) non-metal-ide

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Ionic Multivalent Binary Compounds IUPAC Naming

• Same as Ionic Binary but it indicates the metals
  charge
• List the metal name first
• After the metal name indicate the ion charge in
  brackets using roman numerals.
• The non-metal has -ide suffix added.

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• Do not write 1s and reduce when possible
• ONLY SHOW ROMAN NUMERALS FOR MULTIVALENT
  COMPOUNDS
• Not all transition metals are multivalent and
  thus do not have roman numerals

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Example

• SnO2 ? Sn2 O- ?Sn4O2- ? tin (IV) oxide
• SnO ? Sn O- ?Sn2O2- ? tin (II) oxide

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• Work on the practice questions,
• They are homework
• The Worksheet will be handed in