WRITING FORMULAS and NAMING COMPOUNDS

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WRITING FORMULAS and NAMING COMPOUNDS
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Binary Ionic Compounds

• Write the symbol and oxidation number of the
  element that has the positive oxidation number or
  charge
• Write the symbol and oxidation number of the
  element that has the negative oxidation number or
  charge
• Use subscripts next to each ion so that the sum
  of the charges of all the ions are equal to zero
• OR CRISS CROSS
• Criss cross the absolute value of the oxidation
  numbers and write as subscripts

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NAMING BINARY IONIC COMPOUNDS

• Write the full name of the positive ion
• Write the root name of the negative ion
• Add ide to the root
• DO NOT USE SUBSCRIPTS AS PART OF THE NAME

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BINARY MOLECULAR FORMULAS

• Writing the symbol for the first element in the
  name (usually the element farthest to the left).
  Write the subscript according to the prefix in
  the name.
• Write the symbol for the second element in the
  name. Write the subscript according to the
  prefix in the name.
• REMEMBER THAT THE 1 SUBSCRIPT IS NOT WRITTEN.
  The symbol itself represents the 1 subscript

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NAMING BINARY MOLECULAR COMPOUNDS

• Write the nonmetal name of the 1st element in the
  compound
• Write the nonmetal name of the 2nd element in the
  compound
• Change the ending of the to ide
• Put the prefix in front of each element to tell
  how many atoms of that element are in the
  compound
• If mono is the prefix of the 1st do not add it
  to the name. If there is only one atom of the
  second element then mono needs to be added to
  the name.

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Covalent Prefixes