Neon (Ne)

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Practice neon

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

1. Question 1Ground-state electron configurationWarm-up

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

   A$1s^{2}\,2s^{2}\,2p^{6}$B$1s^{2}\,2s^{2}\,2p^{6}\,3s^{1}$C$1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}$D$1s^{2}\,2s^{2}\,2p^{5}$

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2. Question 2Estimate the effective nuclear chargeWarm-up

   Use the simple shielding model $Z_{\text{eff}} = Z - S$, where $S$ is the number of core (inner-shell, $n < 2$) electrons and electrons in the same shell do not shield each other. What is $Z_{\text{eff}}$ for a valence electron of neon ($\ce{Ne}$)?

   Your answer

   Whole number.

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3. Question 3Compare two elements and explainExam level

   Which element has the higher first ionization energy, $\ce{Ne}$ or $\ce{Xe}$, and why?

   AXe: its larger nuclear charge holds its electrons more tightly.BXe: first ionization energy increases down a group.CNe: its valence electron is in a lower shell (n = 2), closer to the nucleus, so it is held more tightly.DNe: it has a larger nuclear charge than Xe.

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