Chemistry Vocab Unit 1B

chemical change (62)

a process that involves one or more substances changing into new substances

chemical property (57)

the ability of a substance to combine with or change into one or more other substances

chromatography (69)

a technique that separates the components of a mixture on the basis of the tendency of each to travel or be drawn across the surface of another material

compound (71)

is a combination of two or more different elements that are combined chemically

crystallization (69)

a separation technique that results in the formation of pure solid particles of a substance of a solution containing the dissolved substance

distillation (69)

a separation technique that is based on difference in the boiling points of the substance involved

element (70)

a pure substance that cannot be separated into simpler substance by physical or chemical means

extensive properties (56)

are dependent upon the amount of substance present

ex. mass, length and volume

filtration (68)

a technique that uses a porous barrier to separate a solid from a liquid

gas (59)

a form of matter that flows to conform to the shape of its container and fills the entire volume of its container

heterogeneous mixture (67)

one that does not blend smoothly throughout and in which the individual substance remain distinct

homogeneous mixture (67)

has constant composition throughout it always has a single phase

intensive properties (56)

are independent of the amount of substance present

ex. density

law of conservation of mass (63)

that matter is neither created nor destroyed during a chemical reaction its conserved

law of definite proportions (75)

regardless of the amount a compound is always composed of the same elements in the same proportion by mass

law of multiple proportions (76)

when different compounds are formed by a combination of the same elements, different masses of one element combine with the same relative mass of the other element in a ratio of small whole number

liquid (58)

a form of matter that flows, has constant volume, and takes that shape of its container

mixture (66)

a combination of two or more pure substances in which each pure substance retains its individual chemical properties

percent by mass (75)

the ration of the mass of each element to the total mass of the compound as a percentage

periodic table (70)

a table that organizes the elements into a grid mendelev

physical property (56)

a characteristic that can be observed or measured without changing the sample’s composition

ex. density, color, odor, taste, hardness, melting point, and boiling point

solid (58)

a form of matter that has its own definite shape and volume

solution (67)

Homogeneous mixtures

states of matter (58)

all matter that exists on Earth can be classified as one of these physical forms

substance (55)

Matter that has a uniform and unchanging composition also known as a pure substance

ex.water

vapor (59)

to the gaseous state of a substance that is a solid or a liquid at room temperature