In this video you will learn all the science for this topic to get a grade 9 or A* in your science exams!
An unstable radioactive isotope can emit 3 different types of ionising radiation.
A positively charged alpha particle can be emitted from the nucleus of an unstable isotope. An alpha particle has the symbol 𝜶.
An alpha particle has two protons, two neutrons, and no electrons. Its charge is +2.
A negatively charged electron is called a beta particle. A beta particle is emitted from the nucleus of an unstable isotope. Beta particles have the symbol 𝜷.
Gamma rays are not particles, but an electromagnetic wave that is released from the nucleus. Gamma rays have no mass and it has no charge.
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