Praxis 5511 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, making option C (100) the closest estimate.
Option A (10) significantly underestimates the total, as only a small fraction of elements would fall within that range. Option B (50) is also too low, as it overlooks many elements discovered in the latter half of the 20th century and beyond. Option D (1,000) greatly overestimates the number, as it exceeds the known elements by a wide margin. Thus, option C accurately reflects the current understanding of chemical elements.
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