Final answer:
The symbol for the asked iron isotope with 31 neutrons and 24 electrons is ^57Fe, as iron has an atomic number of 26 and the isotope would be ionized with a +2 charge.
Step-by-step explanation:
The student asks for the symbol of an isotope of iron with 31 neutrons and 24 electrons.
The atomic number of iron (Fe) is 26, which means it has 26 protons.
The mass number of this isotope is the sum of protons and neutrons, giving us 26 + 31 = 57.
Therefore, the symbol for this isotope would be ^57Fe, with the mass number at the top left and the atomic number (26) at the bottom left of the Fe symbol.
It's important to note that this isotope would be ionized with a +2 charge because it has 24 electrons instead of the standard 26 electrons for a neutral iron atom.