October+20,+2013

The Chemical Nature of Life Building Molecules Lab

Building Molecules Lab **Standard** 3.3.10.B Describe and explain the chemical and structural basis of living things.

= Learning Objectives =

some common molecules.
Background: What is the basic unit of all elements?

= =

= =

Molecules are formed by bonds. What are the two types of bonds we have focused on in class? = = = 1. = = =

= 2. = = =

Chemical formula subscripts show how many of each type of element will be needed to build a specific molecule. The subscript, set slightly below and following each element symbol tells the number of atoms of that element needed. ex. What would you need to build one molecule of propane (CH 4 ) ?

Carbon (C) Atoms Hydrogen (H) Atoms

What would you need to build one molecule of propane (C 3 H 8 ) ?

Carbon (C) Atoms Hydrogen (H) Atoms

What would you need to build one molecule of glucose (C 6 H 12 O 6 ) ?

Carbon (C) Atoms Hydrogen (H) Atoms Oxygen (O) Atoms

Materials: = Stick and ball Molecule Kits are a good model for representing atoms and the bonds they can make. = = In the kits we are using the following elements: =



Method:
==** You are to build and sketch the listed molecules with the correct numbers and types of atoms. You will also need the correct number of bonds. Most of the selections will only go together in a specific shape and order. Keep trying until your molecule contains all the atoms in it’s formula. **==
 * ==** Use the table above to remind you of the color code for the elements. **==
 * =** Use sticks to show the bonds between atoms. Be sure all the bonding sites (holes) are filled in and there are no sticks with unconnected ends. **=
 * =** Figure out how many atoms of each element you will need to build the molecules **=
 * =** As you complete each molecule sketch them in the box provided. **=
 * =** Label each atom in each molecule with the correct element symbol. **=
 * Example: **
 * Butane **


 * C 4 H 10 **


 * Carbon atoms (C) Hydrogen atoms (H). **

Building Molecules Lab Assessment  Analysis questions to follow Building Molecules Lab.  http://hecksplorations.wikispaces.com/page/edit/October+20%2C+2013?template=


 * RESOURCES **

Lab Worksheet