Particle Model of Matter

matter

is anything that takes up space and has mass

law of conservation of mass

the idea that matter cannot be created or destroyed

physical properties

a property that can be measured or observed without changing the idenity of matter

solubility

the amount of a substance that can dissolve in a given amount of another substance

dissolve

given amount of another substance

physical change

when a charge occurs without a change in a substance's chemical composition at a molecular scale

phase change

when a substance goes from one state of matter to another, the process is a change in state

chemical composition

during a change in state, the substance changes its physical properties without changing its chemical composition

chemical properties

only observed when one attempts to change the identity of a substance

chemical reaction

a change (or lack of a change) in a substance must be observed during or after a chemical reaction

extensive property

one that depends directly on the amount of a substance present

intensive property

one that does not depend on the amount of the substance present

volume

extensive property, change with the amount of substance

mass

extensive property, change with the amount of substance

mixture

a blend of two or more kinds of matter, each of which retains its own identity and properties

pure substances

a fixed composition

homogeneous mixture

mixtures that have the same composition, or are uniform

heterogeneous mixture

mixtures that are not uniform throughout

compound

substances with constant composition that can be broken down into elements by chemical process

decomposed

substances with constant composition that can be broken down into elements by chemical processes

elements

cannot be broken down into simpler substances by chemical or physical means

solutions

mixtures that have the same composition, or are uniform, are said to be homogeneous

filtration

can separate components that have small differences in particle size

evaporation

mixtures can often be separated by using techniques such as filtration, evaporation, distillation, decanting, or centrifugation

distillation

separates components based on differences in the volatility of the components

homogeneous

mixtures that have the same composition, or are uniform

chemistry

is the study of the composition of matter, the physical and chemical changes that matter undergoes, and the energy absorbed or released during those changes

element, compound, or mixture?

element

element, compound, or mixture?

compound

element, compound, or mixture?

mixture

solid, liquid, or gas?

solid

solid, liquid, or gas?

liquid

solid, liquid, or gas?

gas

Atoms

are the building blocks of matter

Atom

the smallest unit of an element that maintains

the identity of the element.