Question

read the passage and use the diagram to answer the next two questions. the figure shows the elements of period 3 and the first 3 elements of group 6a of the periodic table. use the figure to answer questions 10 and 11 which of the elements have atomic radii smaller than s? select all that apply. na cl o ar se p

Explanation:

Step1: Recall atomic radius trends

Atomic radius decreases across a period (from left to right) and increases down a group.

Step2: Analyze each element

• Na: In the same period as S (Period 3), but to the left of S. So, its atomic radius is larger than S.
• Cl: In the same period as S (Period 3), to the right of S. So, its atomic radius is smaller than S.
• O: In a higher period (Period 2) and same group (Group 6A). Since atomic radius decreases up a group, O has a smaller atomic radius than S.
• Ar: In the same period as S (Period 3), to the right of S. So, its atomic radius is smaller than S.
• Se: In a lower period (Period 4) and same group (Group 6A). Since atomic radius increases down a group, Se has a larger atomic radius than S.
• P: In the same period as S (Period 3), to the left of S. So, its atomic radius is larger than S.

Answer:

Cl, O, Ar