Multiple Choice
Which feature distinguished Mendeleev's periodic table from other early arrangements of the elements?
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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
O (Oxygen)
B
Na (Sodium)
C
Si (Silicon)
D
Fe (Iron)
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 oxygen (O) is a nonmetal, sodium (Na) is a metal, and iron (Fe) is a metal.
Identify silicon (Si) as an element located along the 'stair-step' line on the periodic table, which separates metals and nonmetals.
Recognize that elements along this stair-step line, including silicon, exhibit mixed properties and are classified as metalloids.
Conclude that among the given options, silicon (Si) is the metalloid.
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