Multiple Choice
Which of the following best describes how the modern periodic table is arranged?
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2. Atoms & Elements
Periodic Table: Classifications
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Which of the following elements is classified as a metalloid on the periodic table?
A
Na (Sodium)
B
Fe (Iron)
C
Si (Silicon)
D
O (Oxygen)
Verified step by step guidance1
Understand the classification of elements on the periodic table: metals, nonmetals, and metalloids. Metalloids have properties intermediate between metals and nonmetals.
Recall that Sodium (Na) is an alkali metal, located in Group 1 of the periodic table, so it is classified as a metal.
Recognize that Iron (Fe) is a transition metal, found in the d-block of the periodic table, so it is also classified as a metal.
Identify Oxygen (O) as a nonmetal, located in Group 16, known for its nonmetallic properties such as high electronegativity and poor electrical conductivity.
Silicon (Si) is located along the stair-step line that separates metals and nonmetals on the periodic table, which is characteristic of metalloids. Therefore, Si is classified as a metalloid.
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