A mass number of 56.
Iron-56 has 26 protons, 30 neutrons, and 26 electrons.
26 It has 26 protons, 26 electrons and (mostly) 30 neutrons, but 28, 31 and 32 neutrons are natural isotopes of iron as well (though less than 10%).
It has 26 Protons, 26 Electrons, and 30 Neutrons.
26 protons, 26 electrons in iron. Fe-56, the most stable isotope of iron, has 30 neutrons
It has 26 protons and 30 neutrons
The element comes with 30 neutrons is iron. It also has 26 protons.
Iron-56 or 56Fe 56 protons makes it iron. If you add the protons and neutrons, you find the mass, which is 56.
26 protons 26 electrons and 30 neutrons
Iron has 26 protons, and since protons and electrons are usually the same there are 26 electrons in Iron. There is 30 neutrons. So protons=26, electrons=26, neutrons=30.
It varies. Iron is element 26 with a relative atomic mass of 55.85That means that the naturally occurring isotopes must have a range of neutrons.92% of iron atoms have 30 neutrons, 8% have 28 neutrons; 2% have 31 neutrons and there is a small percentage
The number of protons in an atom will always be the same with any atom of the same element. The number of protons is an elements defining characteristic; a different number of protons will produce a different element. So it is not necessary to know the specific isotope (which is given by the mass number), because all atoms, ions, and isotopes of iron will all have 26 protons, the same as the atomic number.
In a neutral iron (Fe) atom, the number of protons is 26, which is the atomic number of iron. The number of neutrons can vary, but the most common isotope of iron, Fe-56, has 30 neutrons. Since the atom is neutral, it will have an equal number of electrons as the number of protons, so it also has 26 electrons.