Lesson Objective: Students will be able to analyze molecular models based on the elements present.

What is a “molecule”?

Molecule A molecule is a group of two or more atoms. Just like elements are made up of atoms, compounds are made up of molecules!

Which molecule do you think is a compound? Why? or

O N N N H H Element. All the same type of atom! Compound. Different types of atoms! O N N N H H

H2O

CH3

What do you think the numbers next to some of the letters in chemical formulas mean?

It tells you how many atoms of that element are in the compound!

Example: H2O = Two atoms of Hydrogen and one atom of Oxygen in each molecule.

Example: CO2 = One atom of Carbon and two atoms of Oxygen in each molecule.

Your Turn! How many atoms of each element are in one molecule of sugar? C6H12O6

C6H12O6 6 atoms of Carbon 6 atoms of Oxygen 12 atoms of Hydrogen

= I use this slide to show how chemical equations can be turned into a visual display. This leads into students creating their own molecules using different types of beans.

Molecule Partner Work I print out the molecule sheets that are in the zip file and make sure every pair of students has them at their desk. They use the different kinds of beans to represent different elements. So for H20, students could have two black beans attached to a kidney bean.

Expectations: Beans are to stay on your worksheet. When time to flip to the other side, BE CAREFUL REMOVING THE BEANS. DO NOT LET THEM GO ON THE FLOOR. Level 1 voice. When done with your sheet, switch with your partners.

Molecule Partner Work Each bean will represent a different element. It is OK for a bean to represent one element in one square, and another element in another.