← Physics (4PH1)
Q1 / 10
Radioactivity
Higher
2 marks
Why is alpha radiation the most ionising but least penetrating form of nuclear radiation?
A
Large, slow particle with +2 charge strongly ionises nearby atoms, losing energy rapidly — very short range
B
Alpha particles move too fast to ionise atoms
C
Alpha particles have no charge so they cannot ionise
D
Alpha is least ionising and most penetrating
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