Multiple Choice
Which group of elements contains 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 transuranium element?
A
Lead (Pb)
B
Gold (Au)
C
Uranium (U)
D
Plutonium (Pu)
Verified step by step guidance1
Understand the definition of transuranium elements: these are elements with atomic numbers greater than that of uranium (atomic number 92).
Identify the atomic numbers of the given elements: Lead (Pb) has atomic number 82, Gold (Au) has atomic number 79, Uranium (U) has atomic number 92, and Plutonium (Pu) has atomic number 94.
Compare each element's atomic number to 92 to determine if it is transuranium. Elements with atomic numbers greater than 92 are transuranium.
Since Plutonium (Pu) has an atomic number of 94, which is greater than 92, it is classified as a transuranium element.
Confirm that Lead, Gold, and Uranium are not transuranium elements because their atomic numbers are less than or equal to 92.
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