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Multiple Choice
Which of the following elements is NOT classified as a nonmetal?
A
Sulfur
B
Phosphorus
C
Oxygen
D
Sodium
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1
Understand the classification of elements into metals, nonmetals, and metalloids based on their physical and chemical properties.
Recall that nonmetals are typically poor conductors of heat and electricity, have high electronegativities, and are found on the right side of the periodic table (except hydrogen).
Identify the elements given: Sulfur (S), Phosphorus (P), and Oxygen (O) are all located in groups known for nonmetallic properties.
Recognize that Sodium (Na) is located in Group 1 of the periodic table, which contains alkali metals, characterized by high conductivity and metallic properties.
Conclude that Sodium is NOT classified as a nonmetal because it exhibits metallic characteristics, unlike Sulfur, Phosphorus, and Oxygen.