Question

6 of 206 of 20 Items






















































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)

Answer 1

To determine the number of protons, neutrons, and electrons in a gallium ion with a +3 charge, we follow these steps:

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

2. **Determine the Number of Neutrons:** The mass number of gallium is 70. The number of neutrons can be found by subtracting the atomic number from the mass number:

\[
\text{Number of neutrons} = \text{Mass number} - \text{Atomic number} = 70 - 31 = 39
\]

3. **Determine the Number of Electrons:** A neutral atom of gallium would have an equal number of electrons as protons, which is 31. However, since we are dealing with a gallium ion with a +3 charge, it has lost 3 electrons:

\[
\text{Number of electrons} = 31 - 3 = 28
\]

So, the breakdown for the gallium ion with a +3 charge is:
- Protons: 31
- Neutrons: 39
- Electrons: 28

Therefore, the table representing these values would look like this:

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