Atomic Radii Trends - AtomicRadiiTrends...

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Atomic Radii Trends Atomic Radii Trends in the Periodic Table In order to talk about the  radius  of an atom, we have to make an arbitrary decision  about where the  edge of the atom is. It is arbitrary because the electron orbitals  do not  end sharply. Nevertheless, we can do like we did with the 3D contour plots of the orbitals and just  arbitarily choose the radius  that the  electron spends 90% of its time inside. The electrons spend 90% of the time inside the black line. Using this definition consistently, we can look at the  trends  of the atomic radii as a  function of position in the periodic table. That trend is. ..
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In general the size of the atom depends on how far the outermost valence electron is  from the nucleus. With this in mind we understand two general trends. .. Size increases down a group:
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Atomic Radii Trends - AtomicRadiiTrends...

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