To determine the number of protons, neutrons, and electrons in a gallium ion with a +3 charge, we start with 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 can be used to find the number of neutrons. The number of neutrons can be calculated using the formula:
\[ \text{Neutrons} = \text{Mass Number} - \text{Atomic Number} \]
So,
\[ \text{Neutrons} = 70 - 31 = 39 \]
- In a neutral atom, the number of electrons equals the number of protons. Since gallium has a +3 charge, it has lost 3 electrons. Therefore, the number of electrons in the ion is:
\[ \text{Electrons} = \text{Protons} - 3 = 31 - 3 = 28 \]
Now we can summarize the particle counts for the gallium ion with a +3 charge:
- Protons: 31
- Neutrons: 39
- Electrons: 28
Thus, the correct table is:
Particle Number
- Protons: 31
- Neutrons: 39
- Electrons: 28
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