20,059
edits
Changes
no edit summary
|-
|[[File:AlphaPenetrationAir.png|center|200px]]
| style="height:20px; width:400px; text-align:left;" |[[Alpha Particle|Alpha particles]] can travel around 5cm 15cm through [[air]] ([[STP]]) before [[colliding]] with and [[ionising]] [[atom]]s or [[molecule]]s.
|}