Final answer:
The ion with 25 protons and 22 electrons is Fe^2+. The correct option is d) Fe^2+
Step-by-step explanation:
The ion with 25 protons and 22 electrons is Fe^2+.
The atomic number of iron is 26, so it has 26 protons.
In order to determine the number of electrons in an ion, you need to consider the charge. Since Fe^2+ has a positive charge of 2, it means it has lost 2 electrons.
The name of the ion with 25 protons and 22 electrons is Mn^2+. To determine this, we need to find an element with 25 protons, which is manganese (Mn). The atomic number of manganese is 25, which means it has 25 protons in its neutral form.
Since the species has three fewer electrons than protons, it means it has a +2 charge, making it Mn^2+. The atomic number of iron is 26, so Fe ions would have 26 protons, not 25.
Therefore, the ion with 25 protons and 22 electrons is Fe^2+.
The correct option is d) Fe^2+