Answer:
There are 30 neutrons in a single Fe2+ atom.
Explanation:
The mass number is equal to the sum of the protons and the neutrons.
M = Z + N
Where M is the mass number, Z is the number of protons, and N is the number of neutrons.
Using the periodic table, we know that the atomic number of Fe is 26.
The atomic number is equal to the number of protons.
56 = 26 + N
N = 30
There are 30 neutrons in a single Fe2+ atom.
