Study the model shown in the picture, the models were all made using the same model kit. The methane model, and the Allchin model are both complete and correct in the hydrogen peroxide model. One atom is incorrectly, represented with a blue spear, think about the model shown above white colors are used to represent the different elements.

Unfortunately, since there is no picture attached or provided in the given question, it is not possible for me to study the model and identify the incorrect representation of the atom using a blue spear. If you can provide the picture or describe the model in more detail, I would be happy to help you analyze it.

Based on the given information, let's analyze the model shown in the picture.

1. Start by identifying the different models: methane, Allchin, and hydrogen peroxide.

2. It is mentioned that both the methane model and the Allchin model are complete and correct.

3. Focus on the hydrogen peroxide model, where one atom is incorrectly represented with a blue spear.

4. Note that white colors are used to represent the different elements in the model.

To proceed further and provide more specific guidance, it would be helpful to have access to the picture of the model.

To identify the incorrectly represented atom in the model, we need to examine the information given in the question and closely observe the picture. Here's how we can approach it:

1. Start by analyzing the information provided in the question. We are told that all the models were made using the same model kit, and both the methane model and the Allchin model are complete and correct. Additionally, the hydrogen peroxide model has one incorrectly represented atom, which is depicted as a blue spear.

2. Look closely at the picture of the model. Make sure you can clearly see the arrangement of the atoms and their corresponding colors.

3. Identify the atoms in the model that are correctly represented. We know that the methane and Allchin models are both correct, so observe the colors used for their atoms. You can compare them with the colors used for the atoms in the hydrogen peroxide model.

4. Focus on the atom marked with the blue spear. Note its location and compare it to the atoms in the methane and Allchin models. Look for any discrepancies in color or positioning.

5. Determine the correct color of the atom based on the information gathered so far. Since both the methane and Allchin models are complete and correct, it implies that the incorrectly represented atom in the hydrogen peroxide model should have the same color as its corresponding atom in either of the complete models.

6. Once you have identified the correct color of the atom, try to replace the blue spear with the correct color in your mind or on a separate image if possible.

By following these steps, you should be able to identify which atom is incorrectly represented with the blue spear in the hydrogen peroxide model.