Alpha Particle
An alpha particle is a positively charged particle emitted from the nucleus of certain radioactive atoms, consisting of two protons and two neutrons bound together. This makes it essentially a helium nucleus, and while it's highly energetic and can ionize atoms it encounters, its large size means it's easily blocked by materials like paper or skin, limiting its penetration in practical applications.
Did you know?
Alpha particles are identical to the nucleus of a helium atom, and when they lose energy and capture two electrons, they transform into stable helium gas— in fact, much of the helium used in balloons and medical imaging comes from the radioactive decay of elements like uranium in the Earth's crust, contributing to about 97% of the world's helium supply.
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