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science notes 8+9

for science quiz wednesday

chemistry the study of properties and how matter changes
matter -takes up space and has volume.-has physical and chemical properites.-made up from elements.
Properites of Matter physical and chemical properties
Physical Properties can be observed without changing the subject
Chemical Properites ability to change into somehting new
Element pure substance that cannot be broken down into another substance. Simpleist of all substances and are found on the periodic table. Elemnets are made up opf atoms.
Atoms smallest particle that can mke up and element. Can not be broken down any farther
Molecules Two or more atoms of elemts held together by a bond. Many elements can exist alone, other elemnets must always be in molecule form.
Compunds two or more different elemnets chemically combined by bonds in a set ratio to create a new substance. new substances have different physical and chemical properites than those of the elements which made it. Compunds are represented by formulas.
Mixtures Two or more substances combined, but not chemicaly combined bonded together. Each substance keeps its own properties. Substances are nort combined in any set ratio. Either homgenously mixed or heterogeneous mixed
Homogeneous evenly kixed
Heterogeneous unevenly mixed
Substance a single kind of matter that is pure
chemical bond the force of attraction between two atoms
chemical formula tells the elements and the ratio of atoms in the compund
solution a kind of homogeneous mixture
Created by: scrlover93