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35 terms

finals

first semester sophmore year
STUDY
PLAY
chemistry
the study of the compositions structure and properties of matter and the changes it underscores
organic
study of most carbon containing compounds
inorganic
study of all substances not classified as organic mainly those compound that don't contain carbon
physical
study of the properties changes and relationships between energy and matter
Analytical
identification of the compounds and compostion of materials
biochemistry
study of substances and processes occurring in living things
theoretical
use of mathmatices and computers to design and predict the properties of new compounds
matter
anything that has mass and takes up space
mass
measure of the amount of matter
solid
has definite volume and shape
liquid
definite volume but an indefinite shape
gas
neither a definite volume or shape
mixtures
blend of two or more kinds of matter each of which retains its own identity and properties
pure substences
are either compound or elements
compounds
substences that is made from atomophere 2 or more elements
pure substance
made of only 1 kind of atom
periods
horizontal rows in the periodic table
group
vertical columns of the periodic table
Periodic trends
decrease in atomic radii across second period, incress in electrons higher charges nucleus
Periodic table
physical and chemical properties of the elements are periodic function of their atomic numbers
mental
element that is a good conducter of heat and electricity
non mental
element that is a poor conductor of heat and electricity
metalloids
some characteristics of mentals and nonmetals
quantum #
specify the properties of atomic orbitals and the properties of electrons in orbitals.
qualitative observatios
shows a quanity of a object
densitiy
the ratio of mass to volume or mass divided by volume
significant digits
a measurement consist of all the digits known with certainy plus one final digit
scientific notation
wrottem om tje fpr, <x 10n where M is number greater than or equal to 1 but less than 10 and n is a whole number. It shortens up the standered form
direct proportion
two quantities that give a constant value when one is divided by the other.
componets of a atom
?
Isotopes
atoms of the same element that have different masses
mass number
total number of protons and neutrons in the nucleus of an isotopes protons and newtrons equal mass number
mol-
amount a substance that contains as many particles as there are atoms. It help us convert elements
wave length
distance between coresponding points on adjacent waves.
Frequency
number of waves that pass a given point in a specific time, usually one second