Atomic and Ionic Radii (Section)
Consider the isoelectronic ions F- and Na+.
(a) Which ion is smaller?
(b) Using Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant, S, calculate Zeff for the 2p electrons in both ions.
(c) Repeat this calculation using Slater’s rules to estimate the screening constant, S.
(d) For isoelectronic ions, how are effective nuclear charge and ionic radius related?
Chapter 5 Textbook Notes 5.1 Hydrogen, oxygen, and water When two or more elements combine to form a compound, an entirely new substance results 5.2 Types of chemical bonds A chemical bond is the force that holds atoms together in a compound Chemical bonds form because they lower the potential energy of the charged particles that compose atoms Ionic bond – the bond that forms between a metal and a nonmetal; electrons are transferred from the metal to the nonmetal o The metal atom becomes a cation and the nonmetal becomes an anion o An ionic compound is formed with a lattice structure of alternating cations and anions Covalent bond – the bond that forms between two or more nonmetals o