An alpha particle contains 0 electrons.

Quick Scoop

An alpha particle is essentially the bare nucleus of a helium-4 atom: it has 2 protons and 2 neutrons, giving it a net charge of +2+2+2. Because it carries this positive charge, it has lost the 2 electrons that a neutral helium atom would normally have, so there are no electrons left bound to it. In many exam and textbook questions, this is exactly why the correct answer to “how many electrons does an alpha particle contain?” is given as 0.

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