Question

read each description in the first column of the table below. if any chemical element with atomic number of 92 or less matches the description, check yes and write the chemical symbol of an element that matches. otherwise check no in the second column.

description	does any element with z ≤92 match the description?	if you checked yes, give the symbol of an element with z ≤92 that matches.
a nonmetal in group 7a.	☐ yes ☐ no
an alkali metal with a lower atomic number than strontium.	☐ yes ☐ no
a transition element in period 3.	☐ yes ☐ no

Explanation:

To solve this, we analyze each description using the periodic table (elements with atomic number \( Z \leq 92 \)):

1. An element in Period 5 and Group 6A

• Step 1: Recall Period 5 (5th row) and Group 6A (chalcogens, 16th column).
• Step 2: The element in Period 5, Group 6A is Tellurium (\( \text{Te} \)) (atomic number 52, \( 52 \leq 92 \)).
• Answer for this row: Yes; Symbol: \( \text{Te} \)

2. A nonmetal in Group 7A

• Step 1: Group 7A (halogens) includes nonmetals (F, Cl, Br, I, At; At is \( Z=85 \), \( 85 \leq 92 \)).
• Step 2: Iodine (\( \text{I} \)) (or Cl, Br) is a nonmetal in Group 7A (\( Z=53 \), \( 53 \leq 92 \)).
• Answer for this row: Yes; Symbol: \( \text{I} \) (or \( \text{Cl} \), \( \text{Br} \))

3. An alkali metal with a lower atomic number than strontium

• Step 1: Alkali metals are Group 1A. Strontium (\( \text{Sr} \)) has \( Z=38 \).
• Step 2: Alkali metals with \( Z < 38 \): Li (\( Z=3 \)), Na (\( Z=11 \)), K (\( Z=19 \)), Rb (\( Z=37 \)) (Rb: \( Z=37 < 38 \)).
• Answer for this row: Yes; Symbol: \( \text{Rb} \) (or Li, Na, K)

4. A transition element in Period 3

• Step 1: Transition elements are in Groups 3–12. Period 3 (3rd row) has elements \( Z=11 \) (Na) to \( Z=18 \) (Ar).
• Step 2: Groups 3–12 in Period 3: None (Period 3 transition elements do not exist; transition elements start in Period 4 for Groups 3–12).
• Answer for this row: No

Final Table (Filled):

Description	Does any element with \( Z \leq 92 \) match?	If yes, give the symbol of an element with \( Z \leq 92 \) that matches.
A nonmetal in Group 7A	Yes	\( \text{I} \) (or \( \text{Cl} \), \( \text{Br} \))
An alkali metal with \( Z < \text{Sr} \)	Yes	\( \text{Rb} \) (or \( \text{Li} \), \( \text{Na} \), \( \text{K} \))
A transition element in Period 3	No	(No element)

(Note: For each "Yes" row, the symbol can vary slightly based on preference, but the above are valid examples.)

Answer:

To solve this, we analyze each description using the periodic table (elements with atomic number \( Z \leq 92 \)):

1. An element in Period 5 and Group 6A

• Step 1: Recall Period 5 (5th row) and Group 6A (chalcogens, 16th column).
• Step 2: The element in Period 5, Group 6A is Tellurium (\( \text{Te} \)) (atomic number 52, \( 52 \leq 92 \)).
• Answer for this row: Yes; Symbol: \( \text{Te} \)

2. A nonmetal in Group 7A

• Step 1: Group 7A (halogens) includes nonmetals (F, Cl, Br, I, At; At is \( Z=85 \), \( 85 \leq 92 \)).
• Step 2: Iodine (\( \text{I} \)) (or Cl, Br) is a nonmetal in Group 7A (\( Z=53 \), \( 53 \leq 92 \)).
• Answer for this row: Yes; Symbol: \( \text{I} \) (or \( \text{Cl} \), \( \text{Br} \))

3. An alkali metal with a lower atomic number than strontium

• Step 1: Alkali metals are Group 1A. Strontium (\( \text{Sr} \)) has \( Z=38 \).
• Step 2: Alkali metals with \( Z < 38 \): Li (\( Z=3 \)), Na (\( Z=11 \)), K (\( Z=19 \)), Rb (\( Z=37 \)) (Rb: \( Z=37 < 38 \)).
• Answer for this row: Yes; Symbol: \( \text{Rb} \) (or Li, Na, K)

4. A transition element in Period 3

• Step 1: Transition elements are in Groups 3–12. Period 3 (3rd row) has elements \( Z=11 \) (Na) to \( Z=18 \) (Ar).
• Step 2: Groups 3–12 in Period 3: None (Period 3 transition elements do not exist; transition elements start in Period 4 for Groups 3–12).
• Answer for this row: No

Final Table (Filled):

Description	Does any element with \( Z \leq 92 \) match?	If yes, give the symbol of an element with \( Z \leq 92 \) that matches.
A nonmetal in Group 7A	Yes	\( \text{I} \) (or \( \text{Cl} \), \( \text{Br} \))
An alkali metal with \( Z < \text{Sr} \)	Yes	\( \text{Rb} \) (or \( \text{Li} \), \( \text{Na} \), \( \text{K} \))
A transition element in Period 3	No	(No element)

(Note: For each "Yes" row, the symbol can vary slightly based on preference, but the above are valid examples.)