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Unformatted text preview: of N, so it is not surprising that the same effect carries over into the third period. That is, the order of ionization energies is Si < Se < S < P. (c) F < O 2 < N 3 These ions are isoelectronic and size increases as the number of protons in the nucleus available to attract the electrons decreases. (d) Cs < Ba < Sr The trend is to increase to the right and decrease down the periodic table. 44 (a) P, phosphorus (b) Be, beryllium (c) N, nitrogen (d) Tc, technetium (e) Cl, chlorine (f) Zn, zinc...
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- Fall '07