15. Use the semiempirical mass formula to obtain an expression for the two-neutron separation energy when A » 1. (Hint: A differential method is far easier than an algebraic one for this problem.) Estimate the size of the various terms and discuss the A dependence. Compare with the following data for Al and Te: 124 Te 16.36 MeV 125 Te 16.00 MeV 126 Te 15.69 MeV 127 Te 15.41 MeV 128 Te 15.07 MeV 129 Te 14.86 MeV 25A1 31.82 MeV 117Te 18.89 MeV 118Te 18.45 MeV 26A1 28.30 MeV 27ΑΙ 24.42 MeV 119Te 18.17 MeV 28A1 20.78 MeV 120 Te 17.88 MeV 29A1 17.16 MeV 121 Te 17.46 MeV 122 Te 17.04 MeV 30AI 15.19 MeV 3ΙΑΙ 13.03 MeV 123 Te 16.80 MeV 130 Te 14.50 MeV Why do we choose two-neutron, rather than one-neutron, separation en- ergies for this comparison?

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Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.