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science test C68

physical change something that changes it's size, shape or state of material
chemical change is any change in which new substances are formed
model is a way to represent an object or describe how a process takes place
nucleus most of an atom's mass is contained in a central core
proton particle that has a positive electric charge
neutron particle that has no electric charge
elctron particle that has negative electric charge
atomic number number of protons in an atom of that element
ion electrically charged atom
radioactive element made up of atoms whose nuclei is broke down or decay into other atoms
nuclear fission splitting nuclei
indicator substance that changes color when mised with acid or base
neutralization reaction between acid and base
salt is a compound that can be formed when an acid reacts with a base
polymer proteins is an organic compound that contains a very loing chain of carbon compounds
Created by: AAhue