How many neutrons would be in the nucleus of an atom of iron-56?

Answer 1

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.

Answer 2

There are 26 protons, 30 neutrons, and 26 electrons. To find the protons, look at the Periodic Table. Iron (Fe) has an atomic number of 26, so that's also how many protons it has. Since it is not an ion, it has to have the same number of electrons as protons, so there are also 26 electrons. To find the neutrons, you just have to take 56-26 (number of protons) to get 30.

Answer 3

Look up atomic number of iron, that gives you number of protons..subtracting number of protons from 56 would give you number of neutrons.

Answer 4

Number of neutrons = Mass number - Atomic number = 56 - 26 = 30

Answer 5

The sum of the number of protons and electrons is equal to the mass number. Iron has 26 protons. So it has 30 neutrons.

Answer 6

26