Iodine (I)

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Practice iodine

Questions from the course about iodine. If you’re signed in, your answers count toward your progress.

1. Question 1Ground-state electron configurationChallenging

   Which is the ground-state electron configuration of a neutral iodine atom ($\ce{I}$)?

   A$[\mathrm{Kr}]\,5s^{2}\,4d^{10}\,5p^{6}$B$[\mathrm{Kr}]\,5s^{2}\,4d^{10}\,5p^{4}$C$[\mathrm{Kr}]\,5s^{2}\,5p^{5}$D$[\mathrm{Kr}]\,5s^{2}\,4d^{10}\,5p^{5}$

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2. Question 2Compare two elements and explainExam level

   Which gaseous atom releases more energy when it gains an electron (has the more exothermic electron affinity), $\ce{I}$ or $\ce{Rb}$, and why?

   ARb: its larger size leaves more room for the added electron.BI: its large Z_eff attracts the added electron strongly, and the electron completes its 5p subshell.CI: it has more occupied electron shells than Rb.DRb: metals gain electrons more readily than nonmetals.

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