Question

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) Responses Particle Number protons 39 neutrons 31 electrons 36Particle Number protons 39 neutrons 31 electrons 36 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 31 neutrons 39 electrons 31

Answer 1

To determine the correct table of particles for a gallium ion with a +3 charge, we need to identify the number of protons, neutrons, and electrons in a neutral gallium atom and then adjust for the charge.

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

2. Neutrons: The mass number (which is the total number of protons and neutrons) of gallium is 70. To find the number of neutrons, we subtract the number of protons from the mass number: \[ \text{Neutrons} = \text{Mass Number} - \text{Protons} = 70 - 31 = 39. \]

3. Electrons for a +3 charge: A neutral gallium atom has the same number of electrons as protons (31 electrons). However, the +3 charge indicates that it has lost 3 electrons, so: \[ \text{Electrons} = 31 - 3 = 28. \]

Now we can summarize the particles for a gallium ion with a +3 charge:

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

Thus, the correct response from the options provided should show the following:

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

The correct table is: Particle | Number --- | --- Protons | 31 Neutrons | 39 Electrons | 28