Writing Molecular Formulas

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Writing Molecular Formulas
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Molecular Compounds

• 1. What are ionic compounds?
• compounds that are made up of ions not atoms
• 2. What do atoms do in order to become ionic
  compounds?
• the metal transfers their excess electrons to the
  non metal

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Molecular Compounds

• 3. What are molecular compounds?
• two non metals sharing electrons

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Molecular Compounds

• 4. How do you name molecular compounds?
• The following prefixes to describe how many atoms
  of each non metal you have
• mono-1, di-2, tri-3, tetra-4, penta-5, hexa-6
• septa-7, octa-8, nona-9, deca-10

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Molecular Compounds

• Examples
• 1. carbon dioxide
• 2. dihydrogen monoxide
• 3. diphosphorus pentoxide
• 4. Nitrogen trioxide
• 5. Oxygen difluoride

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Acids

• 5. What are acids?
• acids are special type of molecular compound that
  kind of acts like an ionic compound when it
  encounters water,
• 6. What do all acids have in common?
• all acids have an Hydrogen that takes off when
  the molecule encounters water

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Acids

• 7. How many types of Acids are there?
• 2-Binary Acids and Ternary Acids
• 8. What is the difference between the two?
• Binary-two elements-Hydrogen and a Halogen(F, Cl,
  Br, I)
• Ternary-three or more elements-Hydrogen and a
  Polyatomic Ion

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Acids

• 9. How do you write the formulas for Binary
  acids?
• easy Example Hydrochloric acid
• 1. acid at the end of the name tells you you
  have an acid-write down an H
• 2. look for the part after the Hydro, you will
  find the root word of the halogen, write that
  symbol down-Ta Da!

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Acids

• Examples
• 1. Hydrobromic acid
• 2. Hydrofluoric acid
• 3. Hydroiodic acid
• 4. Hydrochloric acid

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Acids

• 10. How do you write the formulas for ternary
  acid?
• 1. you will not find Hydro but you will find
  acid-put an H down
• 2. the name will be made up of the root of a
  polyatomic ion and the suffix -ic or -ous
• 3. if it is -ic then the polyatomic ion is the
  -ate version, if it is an -ous then it is the
  -ite version

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Acids

• 4. Find the right polyatomic ion and write it
  down
• 5. Whatever the charge of the Polyatomic ion
  then that is how many Hs you need

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Acids

• Examples
• 1. Phosphoric acid
• 2. Acetic acid
• 3. Sulfurous acid
• 4. Nitric acid
• 5. Sulfuric acid