Multiple Choice
Given the following elements: (a) Si, (b) Na, (c) Cl, which element is most likely classified as a metalloid?
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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
B
O
C
Si
D
Fe
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, and is classified as a metal.
Recognize that Oxygen (O) is a nonmetal, found in Group 16, and is a typical nonmetal element.
Identify Silicon (Si) as an element located along the stair-step line that separates metals and nonmetals, which is characteristic of metalloids.
Confirm that Iron (Fe) is a transition metal, located in the d-block of the periodic table, and is classified as a metal.
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