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How many elements occur naturally on the periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
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Which of the following elements is classified as a metalloid?
A
Phosphorus (P)
B
Iodine (I)
C
Selenium (Se)
D
Germanium (Ge)
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Understand the classification of elements into metals, nonmetals, and metalloids based on their physical and chemical properties.
Recall that metalloids have properties intermediate between metals and nonmetals and are typically found along the 'stair-step' line on the periodic table.
Identify the position of each element on the periodic table: Phosphorus (P), Iodine (I), Selenium (Se), and Germanium (Ge).
Note that Phosphorus, Iodine, and Selenium are located in regions of the periodic table associated with nonmetals.
Recognize that Germanium (Ge) is located along the metalloid line and exhibits properties characteristic of metalloids, making it the correct choice.
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