ACT Science Practice Question #1536 (Foundational (28)) | Test Citadel
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ACT Science Difficulty: Foundational (28)

Digital ACT Science Practice Question #1536

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

A nuclear chemistry lab measured radiation activity from Ba-137m over time: - 0 min: 8,000 cpm - 2.6 min: 4,000 cpm - 5.2 min: 2,000 cpm - 7.8 min: 1,000 cpm What is the half-life of barium-137m?
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Socratic AI Engine Step-by-Step Derivation
0ms Precomputed
⚡ 15-Second Desmos Speed Hack

Time to drop from 8,000 to 4,000 = 2.6 minutes.

Masterclass Solution & Distractor Trap Analysis

Activity halves from 8,000 to 4,000 cpm in 2.6 minutes, and from 4,000 to 2,000 in another 2.6 minutes. Half-life is 2.6 minutes....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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