CHEM 1110 Chapter Notes - Chapter 7: Nonmetal, Noble Gas, Electron Affinity
8 Apr 2016
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Chem 1110: principles of chemistry 1 chapter 7 reading notes. Dmitri mendeleev organized elements by atomic weight for the periodic table: left blank spaces. Henry moseley developed atomic numbers by hitting different elements with high-energy electrons and finding ranges of frequencies: atomic number = number of protons in an atom. Coulomb"s law says the strength of the interaction between two electricy charges depends on the magnitudes of the charges and on the distance between them. In a many-electron atom, each electron experiences a net attraction that is less than it would be in the absence of other electrons. Nonbinding atomic radius/van der waal radius: the shortest distance separating the two nuclei during collisions. Bonding atomic radius: of the distance between the nuclei when two atoms are bonded. Bonding atomic radius increases from top to bottom: happens because of increase in principal quantum number(n) of outer elements, further down you go the greater probability of electrons further from nucleus.
