Study the three models shown below. The models were all made using the same model kit. The methane model correctly represents one molecule of methane gas. The oxygen model correctly represents one molecule of oxygen gas, which contains two oxygen atoms. In the hydrogen peroxide model, one atom is incorrectly represented with a blue sphere.

Question

a. Think about the models shown above. What colors are used to represent the different elements?

(3 points)
The white spheres represent
atoms. The red spheres represent
atoms. The grey spheres represent
atoms.
Question 2

Keep thinking about the models shown above, and consider which elements are represented by which colors.

b. What color should the blue atom actually be?

(1 point)
Responses

white
white

black
black

red
red

grey

Answer 1

a. The colors used to represent the different elements are as follows:

• The white spheres represent hydrogen atoms.
• The red spheres represent oxygen atoms.
• The grey spheres represent carbon atoms.

b. The blue atom should actually be grey, representing a carbon atom, as it is incorrectly represented in the hydrogen peroxide model.