Gen chem Flashcards
provides much if the information that informs the hyphothesis theories
measurement
liters, pounds and centimeters are standard for measurement
unit
7 base unit of SI system
length
meter
time
temperature
electric current
amount of substance
luminous intensity
is the measure of the amount of space occupied by an object.
volume
is the mass per unit volume of a substance
density
recite the formulas
m= dv
d=m/v
v=m/d
argued that all matter was composed of small , finate particles that called atomos
leucippus and democritus
atomos derived the greek word
invisible
he helped to revolutionize chemistry with his hypothesis that the behavior of matter could be explained using an anatomic theory
john dalton
is an smallest unit of an element that can participate in chemical change
atom
consist of atoms of two or more elements combined in a small whole number ratio.
compounds
are neither created nor destroyed during chemical change
atoms
explains that elements combine in ratios of simple whole numbers to form a compound
law of definite proportion
explains that two elements react to form two or more different compounds, which one fixed or constant element, the mass ratio of the constant element in the compounds is expressed in the smallest whole number
law of constant composition
the total mass of substances present at the end of a chemical process is the same as the mass of substances present before the process took place
law of conservation of mass
one of the domains of chemistry, which known as the realm of everyday things that are large enough to be sensed directly by human sight or touch
macroscopic domain
it has particles that are closely packed together and usually arranged in a regular pattern
solid
argon in a tank is example of
gas
it has no definite volume and shape
gas
it takes the shape of the container forms horizontal surface and has fixed volume
liquid
an objects measure of amount of matter in it
mass
the force that gravity exerts on an object which is directly proportional to the mass of the subject
weight
when matter is uniform throughout it is called
homogenous
it has constant composition, and all its specimens have the same make up and properties
pure subtance
about 84 out of 118 elements occured naturally on the earth
false
this type of matter cannot be broken down into a simpler subtance by chemical change
element
bronze is example of
homogenous
composed of two or more types of matter that can be present in varying amounts can be seperated by physical changes such as evaporation
mixtures
granite is an example of
heterogenous
it exibits a uniform composition and appears visually the same throughout
homogenous
salt in water is example of
homogenous
when the matter can be simplified chemically it is called
compound
the greek word atomos means
indivisible
the idea that matter is composed of atoms was coined by
leucippus and democritus
smallest particle of element
atom
it consist of two or more atoms joined by strong forces called chemical bonds
molecules
a property of matter that includes density, color, hardness, melting and boiling points, and electrical conductivity
physical
a chnage that can be obsserve when wax melts, when sugar dissolves in coffee,and when the condences into liquid water
physical
the mass and volume of a subtances are example of
physical
it is anything that occupies space and possesses mass
matter
a property of that doesnt depend on the amount of matter in it
intensive
which of the domain of chemistry are red blood cells under
microscopic
the domain contains the specialized language used to represent components of the macroscopic and microscopic
symbolic domain
it has no shape and volume and has charged particles that are widely seperated
plasma
flame is an example of
plasma
it expands to fill the container
gas
a process that converts sugar into alcohol is called
fermentation
this type of matter can be broken down by chemical changes
compound
all forms of combustion are example of
chemical
the mass and volume of subtance are example of
phisycal
example of intensive property
temperature
if mass and volume of a subtance was combined , what property is it
extensive
