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Comp. of Matter

Unit 2 - 8th Grade

TermDefinition
Composition What an object is made up of.
Matter Objects that have a mass and a volume
Atom The smallest particle that makes up all matter.
Proton Positively charged in the nucleus
Neutron No charge, in the nucleus
Electron Negatively charged, orbiting the nucleus
Molecule Two or more atoms bonded together by sharing or stealing electrons
Compound Two ore more different atoms bonded together
Element One or more of the same atoms bonded together
Chemical Bond Formed when atoms join when they share or steal electrons
Reactant The materials you mix together
Chemical Change When we completely change the composition of an object.
Products The new materials produced
Law of Conservation of Mass Matter can neither be created nor destroyed.
Mixture When we mix things together but the atoms don't bond.
Physical Change When we make an object look different, but it still has the same composition.
Created by: krussoscience