Question

An isotope of gallium is known as gallium-70 it has an atomic number of 31. If it forms a 3+ ion ( Ga3+
) match the numbers of subatomic particles to their types for this cation. Some numbers may be used once, more than once, or not at all. Each blank will only have one solution. (3 points)

Protons
Electrons
Neutrons

31, 39, 70,28,34,3.

Answer 1

For gallium-70 (Ga-70), which has an atomic number of 31:

- **Protons**: The number of protons is equal to the atomic number, which is 31.

- **Electrons**: In a neutral gallium atom, the number of electrons equals the number of protons. However, since Ga forms a 3+ ion, it has lost 3 electrons. Thus, the number of electrons in Ga3+ is \(31 - 3 = 28\).

- **Neutrons**: The number of neutrons can be calculated by subtracting the atomic number from the mass number. The mass number of gallium-70 is 70, so the number of neutrons is \(70 - 31 = 39\).

Now we can match the numbers of subatomic particles to their types:

- **Protons**: 31
- **Electrons**: 28
- **Neutrons**: 39

So the final answers are:
- Protons: **31**
- Electrons: **28**
- Neutrons: **39**