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first semester sophmore year


the study of the compositions structure and properties of matter and the changes it underscores


study of most carbon containing compounds


study of all substances not classified as organic mainly those compound that don't contain carbon


study of the properties changes and relationships between energy and matter


identification of the compounds and compostion of materials


study of substances and processes occurring in living things


use of mathmatices and computers to design and predict the properties of new compounds


anything that has mass and takes up space


measure of the amount of matter


has definite volume and shape


definite volume but an indefinite shape


neither a definite volume or shape


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

pure substences

are either compound or elements


substences that is made from atomophere 2 or more elements

pure substance

made of only 1 kind of atom


horizontal rows in the periodic table


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


element that is a good conducter of heat and electricity

non mental

element that is a poor conductor of heat and electricity


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


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



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


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.


number of waves that pass a given point in a specific time, usually one second

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