(9.6) Which of the following is in the correct order of increasing atomic radius? O Cs > S > Si Cs > Si > S OS > Si > Cs O Si > S > Cs O

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**Question 9.6: Increasing Atomic Radius**

Which of the following is in the correct order of increasing atomic radius?

  - O Cs > S > Si
  - O Cs > Si > S
  - O S > Si > Cs
  - O Si > S > Cs

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When considering the atomic radius, remember that as you move down a group in the periodic table, the atomic radius increases. As you move across a period from left to right, the atomic radius decreases. This is due to the addition of electron shells and increased effective nuclear charge, respectively.

In order to determine the correct answer, compare the positions of cesium (Cs), sulfur (S), and silicon (Si) in the periodic table.

1. Cesium (Cs) is in Group 1 and Period 6.
2. Silicon (Si) is in Group 14 and Period 3.
3. Sulfur (S) is in Group 16 and Period 3.

Considering that cesium is much further down the group than silicon and sulfur and that sulfur and silicon are in the same period but silicon is to the left of sulfur, the correct order from smallest to largest atomic radius is S < Si < Cs. Thus:

- The correct answer is: **S > Si > Cs**

Remember to consider both group and period trends when determining atomic size.

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Transcribed Image Text:--- **Question 9.6: Increasing Atomic Radius** Which of the following is in the correct order of increasing atomic radius? - O Cs > S > Si - O Cs > Si > S - O S > Si > Cs - O Si > S > Cs --- When considering the atomic radius, remember that as you move down a group in the periodic table, the atomic radius increases. As you move across a period from left to right, the atomic radius decreases. This is due to the addition of electron shells and increased effective nuclear charge, respectively. In order to determine the correct answer, compare the positions of cesium (Cs), sulfur (S), and silicon (Si) in the periodic table. 1. Cesium (Cs) is in Group 1 and Period 6. 2. Silicon (Si) is in Group 14 and Period 3. 3. Sulfur (S) is in Group 16 and Period 3. Considering that cesium is much further down the group than silicon and sulfur and that sulfur and silicon are in the same period but silicon is to the left of sulfur, the correct order from smallest to largest atomic radius is S < Si < Cs. Thus: - The correct answer is: **S > Si > Cs** Remember to consider both group and period trends when determining atomic size. ---
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