The ion in question is cobalt with a mass number of 59 and an atomic number of 27, denoted as Co. To determine the number of protons, neutrons, and electrons in a 2+ ion, we follow these steps:
1. Protons: The atomic number of cobalt is 27, which means it has 27 protons.
2. Neutrons: The mass number indicates the total number of protons and neutrons. Since cobalt has a mass number of 59, we can find the number of neutrons by subtracting the number of protons from the mass number:
Neutrons = Mass number – Protons
Neutrons = 59 – 27 = 32 neutrons.
3. Electrons: In a neutral atom, the number of protons equals the number of electrons. However, this is a 2+ ion, which means it has lost 2 electrons. Therefore:
Electrons = Protons – Charge
Electrons = 27 – 2 = 25 electrons.
In summary, for a 59 27 Co 2+ ion:
- Protons: 27
- Neutrons: 32
- Electrons: 25