Sept. 4 - Sept. 8 vocab

mass

quantity of matter

volume

measure of space an object occupies

matter

anything that has mass and occupies space

extensive property

depends on the amount of matter in the sample

intensive property

depends on the type of matter, not the amount

Gas

* no definite shape
* takes shape/volume of container
* particles are far apart and compressible

Liquid

* definite shape/ volume
* adopts shape of container
* particles are close but not too close

Solid

* definite shape/ volume
* doesn’t change shape based on container
* tightly packed and orderly

physical change

change in appearance, not identity of sample

homogenous mixture

a mixture in which the components are evenly mixed

heterogenous mixture

a mixture in which the components are visible

physical property

properties of matter that can be observed w/o changing the matter’s composition

pure substance

have a constant composition and can only be changed by chemical reactions

physical change

a change in which the physical form and properties of a substance change

distillation

a purification process in which the components of liquid mixtures are vaporized and then condensed and isolated

chromatography

the separation of a mixture by passing it through a medium in which the components move at different rates

filtration

a method used to separate mixtures in which some of the particles are large enough in size to be captured with a porous material while others are not

chemical property

the ability of a substance to undergo a specific chemical change

mixture

a physical combination of 2 or more substances that aren’t chemically joined

vapor

any substance in the gaseous condition at the maximum of density consistent with that condition

chemical science

the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties/reactions

phase

a substance which has a particular physical state, either a solid, liquid, or gas, and a particular chemical composition

element

a fundamental item that can’t be easily broken into smaller pieces

precipitate

a solid formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases

compound

when 2 or more elements chemically combine in a fixed ratio by mass

reactant

the substances which participate in a chemical reaction

product

a substance that is present at the end of a chemical reaction

chemical formula

tells the number of atoms of each element in a compound

chemical symbol

a notation of 1 or 2 letters representing a chemical element