Question

Gallium has an atomic number of 31 and a mass number of 70. Which table shows the correct number of protons, neutrons, and electrons in a gallium ion with a +3 charge?(1 point) Responses Particle Number protons 39 neutrons 31 electrons 36 Particle Number protons 39 neutrons 31 electrons 36 Particle Number protons 39 neutrons 31 electrons 39 Particle Number protons 39 neutrons 31 electrons 39 Particle Number protons 31 neutrons 39 electrons 31 Particle Number protons 31 neutrons 39 electrons 31 Particle Number protons 31 neutrons 39 electrons 28

Answer 1

To determine the number of protons, neutrons, and electrons in a gallium ion with a +3 charge, we can use the following information:

• The atomic number of gallium (Ga) is 31, which means it has 31 protons.
• The mass number of gallium is 70, which means the total number of protons and neutrons combined is 70.

To find the number of neutrons, we subtract the number of protons from the mass number:

\[ \text{Neutrons} = \text{Mass Number} - \text{Protons} = 70 - 31 = 39 \]

Next, for the electrons in a +3 charged ion, we need to subtract 3 from the number of protons (because a +3 charge indicates there are 3 fewer electrons than protons):

\[ \text{Electrons} = \text{Protons} - 3 = 31 - 3 = 28 \]

So, the correct counts for the gallium ion with a +3 charge are:

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

This corresponds to the following option from the choices given:

Particle Number

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

This option appears to match your options correctly.