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Chapter 16 - Science

Radioactivity

QuestionAnswer
the process when an unstable nucleus gives off nuclear radiation. Radioactivity
Who discovered Radioactivity? Henri Becquerel
What particle contains 2 protons and 2 neutrons and the nucleus of a helium atom Alpha Particle
What particle contains of an electron or positron Beta Particle
What ray is pure energy (light) Gamma Ray
Some Examples of Radiation: Sickness, Cell Damage, Cancers, Damage to Building Structures
Another name for radioactivity Radioactive Decay
The amount of time it takes for HALF of a radioactive substance to decay Half-Life
The sum of protons and neutrons in the nucleus of an atom Mass Number
An atom of the same protons but different neutrons Isotope
The splitting of a large nucleus into two or more fragments; releases additional neutrons and energy Nuclear Fission
A chain off nuclear fission reactions Nuclear Chain Reaction
The combination of the nuclei of small atoms to form a large nucleus Nuclear Fusion
Huge amounts of energy are given off very quickly Uncontrolled chain reaction
Created by: court0701
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