chem matter

Chemistry

the study of the composition, structures, and properties of matter and the changes they undergo

Chemical

any substance produced by or used in a chemical process that has a definite composition (e.g. water, sucrose, carbon dioxide)

Matter

anything with mass and that takes up space

Physical property

a characteristic displayed by a sample without undergoing any change in its composition (e.g. color, odor, solubility)

Intensive property

does not depend on sample size (e.g. boiling point, density)

Extensive property

depends on sample size (e.g. mass, volume, length)

Chemical property

a characteristic displayed by a sample of matter as it undergoes a change in composition (e.g. rusting, tarnishing, exploding)

Physical change

does not affect composition of a sample

Chemical change (reaction)

changes the composition or molecular structure of a sample

Exothermic reaction

heat released

Endothermic reaction

heat absorbed