12/7/2023 0 Comments Atomic mass of iron![]() ![]() It is an intensive property, which is mathematically defined as mass divided by volume: Typical densities of various substances at atmospheric pressure.ĭensity is defined as the mass per unit volume. ![]() For 63Cu, the atomic mass is less than 63, so this must be the dominant factor. A nucleus with greater binding energy has lower total energy, and therefore a lower mass according to Einstein’s mass-energy equivalence relation E = mc 2. The nuclear binding energy varies between nuclei.This increases the mass of nuclei with more neutrons than protons relative to the atomic mass unit scale based on 12C with equal numbers of protons and neutrons. The neutron is slightly heavier than the proton.There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63, and an isotopic mass in its nuclear ground state is 62.91367 u. The isotopic mass usually differs for other isotopes and is usually within 0.1 u of the mass number. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol.įor 12C, the atomic mass is exactly 12u since the atomic mass unit is defined from it. One atomic mass unit is equal to 1.66 x 10 -24 grams. The unit of measure for mass is the atomic mass unit (amu). Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. See also: Properties of Iron Atomic Mass of Iron ![]() Iron – Properties Element Iron Atomic Number 26 Symbol Fe Element Category Transition Metal Phase at STP Solid Atomic Mass 55.845 Density at STP 7.874 Electron Configuration 3d6 4s2 Possible Oxidation States +2,3 Electron Affinity 15.7 Electronegativity 1.83 1st Ionization Energy 7.9024 Year of Discovery unknown Discoverer unknown Thermal properties Melting Point 1538 Boiling Point 2861 Thermal Conductivity 80.2 Specific Heat 0.44 Heat of Fusion 13.8 Heat of Vaporization 349.6 Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. It is the fourth most common element in the Earth’s crust. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Iron is a metal in the first transition series. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. ![]()
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