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Physics #3

Accelerated Christian Edu. PACE 1120 for nuclear physics.

QuestionAnswer
What is nuclear radioactivity? Nuclear radioactivity is the emission of high-speed particles and electromagnetic radiation caused by the breakdown of unstable nuclei of certain elements.
What is an 'a' particle? An 'a' particle is emitted from the nucleus of a radioactive element. It has two protons, no electrons, has a charge of +2, and is slightly repelled by a positive electrostatic charge.
What is a 'b' particle? A 'b' particle is a high-speed electron emitted from the nucleus of a radioactive element. Since it's a electron, it has a charge of -1 and is strongly repelled by a negative electrostatic field.
What are gamma rays? Gamma rays are electromagnetic waves emitted from the nucleus of a radioactive element. They are very high-energy, high-frequency waves with very short wavelengths.
What do radioactive elements undergo? Radioactive elements undergo three types of nuclear reactions: radioactive decay, fission, and fusion.
What is radioactive decay? The process by which radioactive elements are transformed into more stable atoms as they emit radioactive particles is radioactive decay.
What is transmutation? Transmutation is the transformation of an atom of one element into an atom of an entirely different element.
What is nuclear fission? Nuclear fission is a nuclear reaction in which a nucleus of heavy mass is split into two nuclei of smaller mass.
What is nuclear fusion? Nuclear fusion combines two lightweight, stable nuclei into one more massive nucleus.
What are alpha particles made of? What are cosmic particles made of? Alpha particles are made mostly of helium. Cosmic particles are made mostly of hydrogen nuclei.
Created by: Elisa~Grace
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