Unit 5_Covalent MoleculesAim 5.7_Isomers of Hydrocarbons

Do Now: 1) HW and Reference Tables Out2) Complete the Do Now on your handout using your

reference tables

Isomers – molecules with the same molecular formula but a different structural formula and arrangement of atoms. Side chains – carbon atoms branching away from a central carbon atom in a compound.

Do Now:

HW Review

Video: Isomers of hexanehttp://www.youtube.com/watch?v=qOhEJK4Umds Explain, in terms of # of atoms and molecular structure, why these molecules are isotopes . These molecules have the same…_________________________________________________

But they have a different…._________________________________________________________________________________________

1. Explain, in terms of # of atoms, why methyl butane is an isomer of pentane but ethane is not.

Methyl butane is an isomer of pentane because….____________________________________________________________ ____________________________________________________________________________

Ethane is NOT an isomer of pentane because….____________________________________________________________ ____________________________________________________________________________

2. Explain, in terms of # of atoms, why CH2OHCH3 is an isotope of CH3CH2OH

CH2OHCH3 is an isotope of CH3CH2OH because…

3. Draw an isotope of butane, C4H10. . Use the molecule modeling kits if you need. (Hint: Build C4H10, then rearrange some atoms)

4. Draw the molecule pentane. C5H12 . Pentane has three isotopes. Build and draw the three isotopes of pentane.

Homework: (Use Tables P and Q)

1. Name each hydrocarbon: (How many carbons? Are there double or triple bonds?)

2. Draw each hydrocarbon: