21. of the following elements k, cu, li, and s, which is a nonmetal?

a) k

b) cu

c) li

d) s

Question

21. of the following elements k, cu, li, and s, which is a nonmetal?

a) k

b) cu

c) li

d) s

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "direct_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Periodic Table Groups" ], "new_concepts": [ "Metals and Nonmetals" ], "current_concepts": [ "Periodic Table Groups", "Metals and Nonmetals" ] } ## Identify the classification of each element - Potassium ($\text{K}$): Alkali metal (Group 1) - Copper ($\text{Cu}$): Transition metal (Group 11) - Lithium ($\text{Li}$): Alkali metal (Group 1) - Sulfur ($\text{S}$): Nonmetal (Group 16) ## Determine the nonmetal among the choices - $\text{S}$ is the only nonmetal.

(A) K

(B) Cu

(C) Li

(D) S

{ "subject": "Natural Science", "question_type": "Multiple Choice", "knowledge_point": [ "Natural Science", "Chemistry", "Metals and Nonmetals" ] }

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QUESTION IMAGE

Question

Explanation:

Identify the classification of each element

Determine the nonmetal among the choices

Answer: