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

Brief Explanations:

An ion is a particle with a positive or negative net charge. To determine which models are ions, we need to calculate the net charge for each model. The net charge is calculated by subtracting the number of electrons (each with a charge of - 1) from the number of protons (each with a charge of + 1). Neutrons have no charge, so they do not affect the net charge.

For the first model:

• Number of protons: 1
• Number of electrons: 0
• Net charge: (1-0 = + 1)

For the second model:

• Number of protons: 2
• Number of electrons: 2
• Net charge: (2 - 2=0)

For the third model:

• Number of protons: 3
• Number of electrons: 2
• Net charge: (3-2 = + 1)

For the fourth model:

• Number of protons: 4
• Number of electrons: 4
• Net charge: (4 - 4=0)

Answer:

The first and third models are ions.