Question

an atom with a positive or negative net charge is called an ion. select all of the models of ions,

Explanation:

To determine which models represent ions, we analyze the number of protons (positive charge) and electrons (negative charge) in each model. An ion has a net positive or negative charge, meaning the number of protons ≠ number of electrons.

Step 1: Analyze Top - Left Model

• Protons: Count the orange (+) particles. There are 2 protons.
• Electrons: Count the blue (●) particles. There are 3 electrons.
• Charge: \( 2 - 3=- 1 \) (net negative charge, so it is an ion).

Step 2: Analyze Top - Right Model

• Protons: Count the orange (+) particles. There are 4 protons.
• Electrons: Count the blue (●) particles. There are 3 electrons.
• Charge: \( 4 - 3 = +1 \) (net positive charge, so it is an ion).

Step 3: Analyze Bottom - Left Model

• Protons: Count the orange (+) particles. There is 1 proton.
• Electrons: Count the blue (●) particles. There is 1 electron.
• Charge: \( 1 - 1=0 \) (net neutral charge, so it is not an ion).

Step 4: Analyze Bottom - Right Model

• Protons: Count the orange (+) particles. There are 5 protons.
• Electrons: Count the blue (●) particles. There are 5 electrons.
• Charge: \( 5 - 5 = 0 \) (net neutral charge, so it is not an ion).

The models that represent ions are the top - left and top - right models. If we assume the models are labeled as follows (top - left: Model 1, top - right: Model 2, bottom - left: Model 3, bottom - right: Model 4), the answer is the top - left and top - right models. If we need to represent them based on the check - mark or selection style, the ions are the top - left (with 2 protons, 3 electrons) and top - right (with 4 protons, 3 electrons) atomic models.

Answer:

The top - left and top - right atomic models (the ones with a net charge, i.e., unequal number of protons and electrons). If we consider the visual check - marks, the top - left (with the check) and top - right (with the check - like symbol) are the ion models.