| 21. | The period of this oscillations depends on the type of the backscattering atom and its distance from the central atom.
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| 22. | The " E " represents the number of lone electron " pairs " surrounding the central atom.
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| 23. | Interhalogens with five or seven halogens bonded to a central atom are formed by two elements whose sizes are very different.
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| 24. | The number of fluorine atoms that are packed around the central atom is an important factor for calculating the bond length.
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| 25. | Tetradentate ligands can be neutral, so that the charge of the whole complex is the same as the central atom.
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| 26. | In 1940 his Bakerian lecture with Herbert Marcus Powell correlated molecular geometry with the number of valence electrons on a central atom.
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| 27. | Interhalogens with one or three halogens bonded to a central atom are formed by two elements whose electronegativities are not far apart.
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| 28. | The wavelength of the photoelectron is dependent on the energy and phase of the backscattered wave which exists at the central atom.
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| 29. | If it is large it means that potentials on neighboring atoms have a large influence on the energy of the central atom.
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| 30. | The ligand can have one bend so that one is at the pole and three on the equator of the central atom.
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