producer

METHANE

with your models, construct the molecule methane CH4

hold the model so that only two hydrogens are in contact with the benchtop and imagine pressing the model flat onto the desktop.

draw the structure of methane as it would look in two dimensional space o your report sheet. this is the usual way that three dimensional structures are written

with the model resting so that three hydrogens are on the benchtop, examine the structure. move the structure so that a different set of three hydrogens are on the desk each time and compare the different placement

determine whether the hydrogens in the methane are equivalent

use a protractor to measure the C- H bond angle on the model

1. Draw the CH₄ structure

2. Does the structure look different when you rotate the model?

3. Are the hydrogen atoms equivalent? YES or NO

4. What is the H-C-H bond angle?