Question

An atom of 65as has a mass of 64. 949563 amu. mass of1h atom = 1. 007825 amu mass of a neutron = 1. 008665 amu. calculate the mass defect (deficit) in amu/atom.

Answer 1

The mass defect of an atom is 10.672592 amu/atom.

The mass defect is the discrepancy between the nucleus of an atom's anticipated mass and its actual mass. This discrepancy is due to the binding energy of a system, which might manifest as excess mass.

A key characteristic of a nucleus is the nuclear mass defect, which has a set value equal to a specific amount of binding energy for that nucleus.

The binding energy (BE) of a nucleus is the mass defect multiplied by the square of the speed of light or the energy released during the nucleus' formation.

Mass of the atom = 64.949563 amu

Mass of the proton = 1.007825 amu

Mass of the neutron = 1.008665 amu

Arsenic has 33 protons and 42 neutrons.

Mass defect = Mp + Mn - MA

                    = 33 × 1.007825 + 42 ×  1.008665 - 64.949563

                    = 33.258225 + 42.36393 - 64.949563

                    = 10.672592 amu/atom

Therefore, the mass defect of atom is 10.672592 amu/atom.

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