chemistry
scientific study of the composition, structure, and properties of matter and the changes that matter undergoes
chemical
any substance that has a defined composition
atom
smallest unit of an element that maintains the chemical properties of that element
change of state
change of a substance from one physical state to another
chemical change
a change that occurs when one or more substances change into entirely new substances with different properties
chemical property
property of matter that describes the substance's ability to participate in chemical reactions
chemical reaction
process where one or more substances change to produce one or more different substances
compound
a substance made up of the atoms of two or more different elements joined by chemical bonds
element
substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have same atomic number
extensive property
property that depends on the amount of matter present
gas
state of matter without a definite shape or volume
heterogeneous
doesnt have uniform composition and properties throughout
homogeneous
has uniform composition and properties throughout
intensive property
property that doesn't depend on matter
liquid
state of matter that has a definite volume but no definite shape
mass
measure of the amount of matter in an object
matter
anything that has mass and takes up space
mixture
combination of 2 or more substances that are not chemically bound
physical change
change that doesn't change the identity of the substance
physical property
property of a substace that doesnt involve a chemical change
plasma
state of matter that exists at super-high temperatures in which all molecules are dissociated and most atoms are ionized