Lab Safety, Measurements, and Properties of Matter

Chemistry Unit 0 vocabulary

Substance

A chemical and is matter that has definite and uniform composition

Matter

Anything that has mass and takes up space

Compound

Made up of two or more different elements that are combined chemically

Mixture

Combinations of pure substances which retain their individual chemical properties

Element

Pure substance that can't be broken down by chemical or physical means

Periodic Table

Organization of the elements into rows and columns based on similar properties

States of Matter

Physical forms which matter exists naturally in

Physical Property

Characteristic of matter that are observable or measurable without changing composition

Chemical Properties

Ability or inability of a substance to combine with or change into one or more other substances

Homogeneous

Referring to a mixture with constant composition throughout

Heterogeneous

Referring to a mixture that does not blend smoothly throughout and in which the individual substances remain distinct

Physical Change

changes which alter a substance but not its composition

Chemical Change

Change of one or more substances into new susbtances

Distillation

Separating homogeneous mixtures based on differences in the boiling points of the substances involved

Filtration

Usage of a porous barrier to separate a solid from a liquid in heterogenous mixtures

Sublimation

Process during which a solid changes to vapor without going through the liquid phase

Chromatography

Separation of a mixture dissolved in a gas or liquid based on ability of each component to travel or to be drawn across the surface of a fixed substrate.

Solution

Another word for homogenous mixtures

Metric System

a system for mathematical units used for measuring various quantities