HONC1234 PRACTICE  Using HONC1234, draw structural formulas for the following molecules  C 3 H 8 O 2  C 5 H 13 N  C 4 H 10  C 5 H 12 O  C 8 H 19 N

HONC1234  We can summarizing the bonding of the 4 main organic elements using the following rule  Hydrogen forms 1 bond  Oxygen forms 2 bonds  Nitrogen forms 3 bonds  Carbon forms 4 bonds 

With your table, form a hypothesis as to why you think these elements form the bonds that they do

THE OCTET RULE

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REMEMBER

 Noble gases have 8 valence electrons (a full octet) and are very stable  In order to be stable, all elements want to gain, lose, or share electrons to have a full octet

THE OCTET RULE  REMEMBER  Noble gases have 8 valence electrons (a full octet) and are very stable  In order to be stable, all elements want to gain, lose, or share electrons to have a full octet  How many valence electrons does carbon have? How many does it have room for?

THE OCTET RULE  REMEMBER  Noble gases have 8 valence electrons (a full octet) and are very stable  In order to be stable, all elements want to gain, lose, or share electrons to have a full octet  How many valence electrons does nitrogen have? How many does it have room for?

THE OCTET RULE  REMEMBER  Noble gases have 8 valence electrons (a full octet) and are very stable  In order to be stable, all elements want to gain, lose, or share electrons to have a full octet  How many valence electrons does oxygen have? How many does it have room for?

THE OCTET RULE  REMEMBER  Noble gases have 8 valence electrons (a full octet) and are very stable  In order to be stable, all elements want to gain, lose, or share electrons to have a full octet  How many valence electrons does hydrogen have? How many does it have room for?

HONC1234 PRACTICE  Draw a structural formula for carbon dioxide CO 2

MULTIPLE BONDS  Molecules can contain double or triple bonds so that two atoms can share more than two electrons  A double bond contains 4 electrons  A triple bond contains 6 electrons

DRAW A STRUCTURAL FORMULA FOR…  C 5 H 10

DRAW A STRUCTURAL FORMULA FOR…  C 2 H 2

DRAW A STRUCTURAL FORMULA FOR…  C 2 H 4

DRAW A STRUCTURAL FORMULA FOR…  CH 2 O

DRAW A STRUCTURAL FORMULA FOR…  C 2 HN

CREATE YOUR OWN MOLECULE  Write a molecular formula and a structural formula for a molecule that has at least…  4 carbon atoms  2 oxygen atoms  1 nitrogen atom  One double or triple bond

LOOKING AHEAD…  Thursday  Limitations of structural formulas  Lewis Dot Diagrams  Friday  Quiz!