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Changes in Matter
Test Review
Term | Definition |
---|---|
Chemical Change | Chemical change is any change that results in the formation of new chemical substances. |
Physical Change | A physical change is any change NOT involving a change in the substance's chemical identity. |
Chemical Property | A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction. |
Physical Property | A physical property is any property that is measurable, whose value describes a state of a physical system. |
Synthesis | Two or more elements or compounds combine to make a more complex substance. |
Decomposition | Compounds break down into simpler substances. |
Single Replacement | Occurs when one element replaces another one in a compound. |
Double Replacement | Occurs when different atoms in two different compounds trade places. |
Atom | The smallest object that retains properties of an element. |
Molecule | A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. |
Conservation of Mass | A principle stating that mass cannot be created or destroyed. |
Reactants | The reactants are the substances that are present before the chemical change takes place. |
Products | The compounds that are formed when a reaction goes to completion. |