Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
chemistry
|
study of the compostion of matter
|
|
matter
|
anything that has mass and takes up space
|
|
substance
|
matter that has uniform and definite compostition
|
|
mass
|
amount of matter an object contains
|
|
solid
|
constant shape
deffinite volume low expansion on heating low compress ability |
|
liquid
|
shape changes
definite volume medium expansion on heating low compress ability |
|
gas/vapor
|
shape changes
voume changes high expansion on heating high compress ability |
|
vapor: def:
|
the gaseous state of a substance that is normally a solid or liquid at room temp.
|
|
physical change
|
change occurs but you still have the same substance.
ex: boiling, melting, grinding, tearing |
|
physical property
|
properties that can be measured or observed without changing the composition of matter.
ex: melting pount, boiling point, density, color |
|
reactants
|
starting subnstance in a reaction
|
|
products
|
substances formed in a reaction
|
|
chemical change
|
change that affects the chemical properties and creates a new substance.
|
|
chemical property
|
properties that can be observeed only when substances interact.
ex: flammability, rusting, reactivity w/ acid. |
|
law of conservation of mass
|
in a chemical or physical change mass is not created or destroyed it is conserved.
|
|
element
|
simploesest from of matter; seperated by physical means
|
|
compound
|
2 or more difrferent elements combined
** can only be seperated by chemical means ex: sugar= carbon+water; c12H22O11 --> H2 + H20 |
|
chemical symbols
|
represents an element
|
|
mixture
|
blend of two or more SUBSTANCES
|
|
solutions
|
a homogeneous mixture
|
|
phase
|
part of a mixture with uniform compostion.
|
|
heterogenous mixture
|
not uniform in composition
Ex: 2 shovels of dirt arn't exactly the same. |
|
distillation
|
a method using boiling points and oncdesation to seperate liquidss form solids & gases.
|
|
homogeneous mixture
|
uniform in compostion
EX: salt water, recipies. |
|
solution ex:
gas-gas |
air
|
|
solution ex:
liquid-gas |
humidity
|
|
solution ex:
gas-liquid |
carbonated water
|
|
solution ex:
LIQUID-LIQUID |
rubbing alcohol
|
|
solution ex:
solid-liquid |
salt water
|
|
solution ex:
solid-solid |
brass, bronze, white gold
|