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science unit one

test!!!!!!!!!1

QuestionAnswer
physical change affecting the form of a chemical substance, but not its chemical composition.
chemical change a usually irreversible reaction involving the rearrangement of the atoms of one or more substances
endothermic accompanied by or requiring the absorption of heat.
exothermic accompanied by the release of heat.
Chemistry the branch of science that deals with the identification of the substances of which matter is composed;
Atom the basic unit of a chemical element.
Molecule a group of atoms bonded together
Proton positive electric charge
Neutron about the same mass as a proton but without an electric charge
Electron charge of negative electricity
Compound a thing that is composed of two or more separate elements; a mixture.
Chemical Reaction a process that involves rearrangement of the molecular or ionic structure
Physical Change changes affecting the form of a chemical substance
Closed System In nonrelativistic classical mechanics, a closed system is a physical system that doesn't exchange any matter
Law of Conservation of Mass states that mass in an isolated system
Synthetic made by chemical synthesis
Created by: lexialexa11