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In this chemistry class, you will learn that radioactivity is the spontaneous disintegration of certain atomic nuclei, accompanied by the emission of alpha, beta particles or gamma radiation. This phenomenon occurs due to the instability of the atomic nucleus (number of protons and neutrons). Stoodi is a channel with video lessons for school reinforcement and preparation for college entrance exams and ENEM in the subjects of Mathematics, Portuguese, Physics, Chemistry, Biology and History. Study with us ???? https://aedu.me/estude-agora Follow Stoodi on social media: Instagram: / stoodibr Tiktok: / stoodibr Twitter: / stoodibr Facebook: / stoodinoface