Chemistry Atomic Structure BUMHS 2024
PMDC Verified Question 16 of 95
One picometer (pm) = ?
A
\( 10^{-6} \text{ m} \)
B
\( 10^{-8} \text{ m} \)
C
\( 10^{-10} \text{ m} \)
D
\( 10^{-12} \text{ m} \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: \( 10^{-12} \text{ m} \)
Concept: The metric system relies on a standardized set of prefixes to denote powers of ten.

Formula: None required.

Solution:
  • The prefix "pico" (symbol \( p \)) strictly corresponds to a factor of \( 10^{-12} \).
  • Therefore, 1 picometer (pm) is equal to \( 10^{-12} \text{ meters} \).
  • This unit is extremely useful in chemistry, as atomic radii typically fall in the range of 50 to 300 picometers.


Why other options are incorrect: \( 10^{-6} \) is micro (\( \mu \)). \( 10^{-8} \) is not a standard named prefix. \( 10^{-10} \) is an Angstrom (\( \text{\AA} \)).

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