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submicroscopic particles, fundamental building blocks of ordinary matter


two or more atoms attached together in a specific geometrical
arrangement, come in different shapes and patterns


a concise statement of a relationship between phenomena that is always the same under the same conditions.


a unifying principle that explains a body of facts and/or those laws that are based on them


anything that occupies space and has mass


types of particles, arrangement of the particles, attractions and attachments between the particles


whether it's solid, liquid, or gas


Rigid shape, Maintains volume, not compressible, doesn't flow


Assumes, containers shape, maintains volume, not compressible, flows


Assumes containers shape, maintains volume, compressible and flows

Pure Substance

Made up of only one component and its composition is invariant, All samples show the same intensive properties


Made up of two or more components in proportions that can vary from one sample to another, samples may show different intensive properties


Made of one type of atom (some
elements found as multi-atom molecules in nature), combine together to make


Made of one type of molecule, or an array of ions, Units contain two or more different kinds of atoms

Physical properties

the characteristics of matter that can be changed without changing its composition - odor, color, density, appearance, melting point, boiling point, etc.

Chemical properties

the characteristics that a substance displays only by changing its composition via contact with other matter or the influence of energy (a chemical change) - corrosiveness, flammability, acidity, toxicity, etc.


The boiling of water is a _______ change


The rusting of iron is a ________ change

extensive property

depends upon how much matter is being considered.

Intensive property

does not depend upon how much matter is being considered.


he capacity to do work

kinetic or potential

Energy is classified as either


is energy of motion


is energy that is stored in the matter

Law of Conservation of Energy

_______ states that whatever process you do that converts energy from one type or form to another, the total amount of energy remains the same

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