Question

Iron (fe) has 26 protons and 30 neutrons which of the following is most likely atomic weight of iron

Answer 1

Proton mass = 1.673 x 10-27 kgneutron mass = 1.675 x 10-27 kg Mass of the isotope: M = [26(1.673 x 10-27) + 32(1.675 x 10-27)] kg = 9.710 x 10-26 kg (b) Mass number = 26 + 32 = 58Atomic number = 26 Symbol: 5826Fe

Answer 2

Answer:

The correct option is C

Explanation:

The atomic mass of an element can be determined by the addition of the atomic number of the element and the number of the neutrons present in the element. Atomic number is the number of protons present in the nucleus of an atom. Both the protons and neutrons are present in the nucleus of an atom. The mass of an atom is determined by the nucleus of the atom.

From the above, we can deduce that the atomic weight of Iron (Fe) is

26 protons + 30 neutrons = 56

Atomic mass of Fe is 56. From the options, it can be deduced that the closest to 56 is 55.84