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Unformatted text preview: s and 2 p electrons combine to form a maximum at around 0.18 and the 3 s and 3 p electrons combine to form a maximum at around 0.7 Why is the 1s shell in Argon so much closer to the nucleus than the 1s shell in Neon, and why is that closer than the 1s shell in helium? The nuclear charge (Z) of He = 2+, Ne = 10+, Ar = 18+ The inner most electrons (1s shell) are not shielded by other electrons, therefore the attraction to the nucleus is greater with higher number of protons Likewise, the n=2 shell of Ar is closer to the nucleus than the n=2 shell of Ne. The Z eff for the 2s subshell of Ne would be (10-2) = 8+, and for Ar would be (18-2) = 16+. Thus, the 2s subshell electrons in Ar would be closer to the nucleus due to the greater effective nuclear charge . Three properties that provide important insights into chemical behavior include: 1. atomic size 2. ionization energy 3. electron affinity...
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