Praxis 5511 Practice Test Practice Question
The current number of known chemical elements is closest to
Correct Answer: C
Rationale: The current number of known chemical elements is approximately 118, which is closest to option C: 1000.
Option A (10) significantly underestimates the number of elements, as there are over a hundred recognized by the International Union of Pure and Applied Chemistry (IUPAC).
Option B (50) also falls short, as it does not account for the many elements discovered since the mid-20th century.
Option D (10000) is an overestimation, as it exceeds the total number of known elements by a large margin. Thus, option C is the most accurate representation of the current count.
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