Gallium has an atomic number of 31 and a mass number of 70. Which table shows the number of protons, neutrons, and electrons in a gallium ion with a +3 charge?(1 point)

Question

Responses

Particle Number
protons 31
neutrons
39

electrons 31Particle Number protons 31 neutrons 39 electrons 31

Particle Number
protons 39
neutrons
31

electrons 39Particle Number protons 39 neutrons 31 electrons 39

Particle Number
protons 31
neutrons
39

electrons 28Particle Number protons 31 neutrons 39 electrons 28

Particle Number
protons 39
neutrons
31

electrons 36

Answer 1

To determine the number of protons, neutrons, and electrons in a gallium ion with a +3 charge, let's break it down.

1. Protons: The atomic number of gallium (Ga) is 31, which means it has 31 protons.

2. Neutrons: The mass number of gallium is 70. The number of neutrons can be calculated by subtracting the atomic number from the mass number: \[ Neutrons = Mass\ Number - Atomic\ Number = 70 - 31 = 39 \] So, gallium has 39 neutrons.

3. Electrons: A neutral gallium atom has the same number of electrons as protons, which is 31. However, the gallium ion has a +3 charge, indicating that it has lost 3 electrons: \[ Electrons = Protons - Charge = 31 - 3 = 28 \]

Now we can summarize the information:

• Protons: 31
• Neutrons: 39
• Electrons: 28

Therefore, the correct table should look like:

| Particle | Number | |-----------|--------| | Protons | 31 | | Neutrons | 39 | | Electrons | 28 |

This matches the third response option.