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Chemistry exam2011

chemistry midterm

QuestionAnswer
chemistry cience thats deals with the matter of the universe and the changes they under go
theory explaination that has stood up to much testing and observation
natural law summary of observation
scientific method process used to make and explain discoveries to solve problems
matter has mass and occupies space
compound atoms of different elements chemically combined
element cannot be separated into similar substances
solid has a fixed shape and volume
liquid has a fixed volume but assumes shape of its container
gas no fixed volume or shape
physical properties inherent characteristics of a substance
chemical properties ability to form new substances
physical change composition of a substince is not affected
chemical change a new substance is formed
physical properties density/harness, color/odor, melting/boiling pint
nucleus dense, positively charged center of an atom; proton and neutron
mass number sum of the protons and the number of neutrons in the nucleus of an atom
electron negetivley charged subatomic particle
isotopes atom with same number of protons but different number of neutrons
ion atom with a charge
polyatomic ions ions containg several atoms
binary ionic compounds metal and nonmetal bonded together
D=m/v formula for density
average atomic mass weighted aaverage of all of the isotopes of an element
mole 6.022x 10^23 atoms
chemical reaction process in which a new substance is formed
reactant substance that enters into a chemical reaction
product written on the right side of the arrow in a chemical equation
coefficient numbers used to balancce chemical equations
Created by: emilyarena
 

 



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