Multiple Choice
Which three elements are the most abundant in Earth's crust?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
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Which of the following group 15 elements is classified as a metalloid?
A
Nitrogen (N)
B
Phosphorus (P)
C
Bismuth (Bi)
D
Arsenic (As)
Verified step by step guidance1
Understand the classification of elements in the periodic table: metals, nonmetals, and metalloids. Metalloids have properties intermediate between metals and nonmetals.
Identify the group 15 elements listed: Nitrogen (N), Phosphorus (P), Arsenic (As), and Bismuth (Bi).
Recall the general properties of these elements: Nitrogen and Phosphorus are nonmetals, Bismuth is a metal, and Arsenic exhibits properties of both metals and nonmetals.
Recognize that metalloids are typically found along the 'stair-step' line on the periodic table, which separates metals and nonmetals. Arsenic is located on this line.
Conclude that Arsenic (As) is classified as a metalloid because it has intermediate properties and is positioned on the metalloid boundary in group 15.
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