p9C.1 Familiarity with the magnitudes of overlap integrals is useful when con-sidering bonding abilities of atoms, and hydrogenic orbitals give an indicationof their values. (a) The overlap integral between two hydrogenic 2s orbitals is1 ( ZRZR+.2а, " 12 а,1+ZR240 a,-ZR/Z0S(2s, 2s)={1+Plot this expression. (b) For what internuclear distance is S(2s,2s) = 0.50?(c) The side-by-side overlap of two 2p orbitals of atoms of atomic number Z isZR1 ( ZRZRS(2p,2p) ={1+10 a,2a,120a.Plot this expression. (d) Evaluate S(2s,2p) at the internuclear distance youcalculated in part (b).

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P9C.1 Familiarity with the magnitudes of overlap integrals is useful when con- sidering bonding abilities of atoms, and hydrogenic orbitals give an indication of their values. (a) The overlap integral between two hydrogenic 2s orbitals is