Answer :
Let's analyze each description and compare it with the periodic table to determine if an element with atomic number [tex]$Z \leq 92$[/tex] matches it.
### Description 1: An element in Period 1 and Group 5A
- Period 1 contains only two elements: Hydrogen (H) and Helium (He).
- Group 5A (or Group 15) elements include Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), and Bismuth (Bi).
- Since there are no elements in Period 1 that belong to Group 5A, NO element matches this description.
- Mark No in the second column, and leave the third column blank.
### Description 2: A nonmetal in Group 6A
- Group 6A (or Group 16) of the periodic table contains Oxygen (O), Sulfur (S), Selenium (Se), Tellurium (Te), and Polonium (Po).
- Among these, Oxygen, Sulfur, and Selenium are classified as nonmetals.
- Since there are nonmetals in Group 6A, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of one of these nonmetals; let's choose Sulfur (S).
### Description 3: An alkali metal with a higher atomic number than antimony
- The alkali metals (Group 1 elements) include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
- Antimony (Sb) has an atomic number of 51.
- Among the alkali metals, Cesium (Cs) and Francium (Fr) have atomic numbers higher than 51.
- Since Cesium (Cs) has an atomic number of 55 which is less than 92, and it matches the description, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of the alkali metal that matches; let's choose Cesium (Cs).
### Description 4: A main-group element in Period 3
- Period 3 main-group elements include Sodium (Na), Magnesium (Mg), Aluminum (Al), Silicon (Si), Phosphorus (P), Sulfur (S), Chlorine (Cl), and Argon (Ar).
- All of these are main-group elements.
- Therefore, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of one of these main-group elements; let's choose Sodium (Na).
Finally, compiling all the answers into the given table format:
[tex]\[ \begin{tabular}{|c|c|c|c|} \hline description & \multicolumn{2}{|c|}{\begin{tabular}{l} Does any element \\ with $Z \leq 92$ match \\ the description? \end{tabular}} & \begin{tabular}{l} If you checked yes, give \\ the symbol of an \\ element with $Z \leq 92$ \\ that matches. \end{tabular} \\ \hline An element in Period 1 and Group 5A. & & \checkmark & $\square$ \\ \hline A nonmetal in Group 6A. & \checkmark & & S \\ \hline \begin{tabular}{l} An alkali metal with a higher atomic \\ number than antimony. \end{tabular} & \checkmark & & Cs \\ \hline A main-group element in Period 3. & \checkmark & & Na \\ \hline \end{tabular} \][/tex]
### Description 1: An element in Period 1 and Group 5A
- Period 1 contains only two elements: Hydrogen (H) and Helium (He).
- Group 5A (or Group 15) elements include Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), and Bismuth (Bi).
- Since there are no elements in Period 1 that belong to Group 5A, NO element matches this description.
- Mark No in the second column, and leave the third column blank.
### Description 2: A nonmetal in Group 6A
- Group 6A (or Group 16) of the periodic table contains Oxygen (O), Sulfur (S), Selenium (Se), Tellurium (Te), and Polonium (Po).
- Among these, Oxygen, Sulfur, and Selenium are classified as nonmetals.
- Since there are nonmetals in Group 6A, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of one of these nonmetals; let's choose Sulfur (S).
### Description 3: An alkali metal with a higher atomic number than antimony
- The alkali metals (Group 1 elements) include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
- Antimony (Sb) has an atomic number of 51.
- Among the alkali metals, Cesium (Cs) and Francium (Fr) have atomic numbers higher than 51.
- Since Cesium (Cs) has an atomic number of 55 which is less than 92, and it matches the description, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of the alkali metal that matches; let's choose Cesium (Cs).
### Description 4: A main-group element in Period 3
- Period 3 main-group elements include Sodium (Na), Magnesium (Mg), Aluminum (Al), Silicon (Si), Phosphorus (P), Sulfur (S), Chlorine (Cl), and Argon (Ar).
- All of these are main-group elements.
- Therefore, the answer is YES.
- Mark Yes in the second column.
- Provide the symbol of one of these main-group elements; let's choose Sodium (Na).
Finally, compiling all the answers into the given table format:
[tex]\[ \begin{tabular}{|c|c|c|c|} \hline description & \multicolumn{2}{|c|}{\begin{tabular}{l} Does any element \\ with $Z \leq 92$ match \\ the description? \end{tabular}} & \begin{tabular}{l} If you checked yes, give \\ the symbol of an \\ element with $Z \leq 92$ \\ that matches. \end{tabular} \\ \hline An element in Period 1 and Group 5A. & & \checkmark & $\square$ \\ \hline A nonmetal in Group 6A. & \checkmark & & S \\ \hline \begin{tabular}{l} An alkali metal with a higher atomic \\ number than antimony. \end{tabular} & \checkmark & & Cs \\ \hline A main-group element in Period 3. & \checkmark & & Na \\ \hline \end{tabular} \][/tex]
