Interpretation:
It is to be explained why alpha particles are less penetrating.
Concept introduction:
An unstable atomic nucleus loses energy via radiation through radioactive decay. A material is deemed radioactive if its nuclei are unstable.
Answer to Problem 77A
Alpha particles are slow, heavy, and attracted to opposite-charged particles.
Explanation of Solution
An helium atom’s nucleus and an alpha particle have many similarities (mass of
They only move in the air for approximately an inch and are relatively heavy. When their source is outside the human body, alpha particles pose no threat because they can be easily covered by a single sheet of paper and cannot pass through the outer, dead layer of skin.
Alpha particles are slow, heavy, and attracted to opposite-charged particles.
- Alpha particles are slow, heavy, and attracted to opposite-charged particles.
- Alpha particles have little penetration power as a result.
Chapter 25 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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