Chapter 3 Review

Chapter 3 Review - The periodic table...

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<Chapter 3 Review> - The periodic table organizes the elements into groups with similar physical and chemical properties - The physical structure of the atom, as determined by experiments, is summarized in the planetary model. In an atom with atomic number , there are Z electrons moving around a dense nucleus, which has positive charge +Z e - The physical structure of the atom can be understood using Coulomb’s law, which describes the forces between each electron and the nucleus and between the electrons in many-electron atoms. - Ionization energy is the minimum energy required to remove an electron from an atom and place it infinitely far away with zero kinetic energy. - Periodic trend in ionization energies suggested the shell model of the atom in which electrons occupy concentric shells located at increasing distances from nuclei. - Electron affinity is the energy released when electron attaches to an atom to form a stable anion; by convention, it is reported as a positive quantity.
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