| front |
back |
revisions |
lasted changed by |
history |
| metalloid |
along step ladder
semiconductors- Si, Ge |
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| noble gases |
group 18
non reactive
very stable |
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| nonmetal |
right side of table
poor conductor |
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| metal |
left side of periodic table
good conductor of heat/electricity, luster, ductile, malleable |
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| period |
horizontal rows (1-7) |
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| group/family |
vertical columns(1-18)
elemensts very similar to each other in a family |
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| law of definite composition |
a chemical contains the smae element in exactly the same proportion by mass regardless of size |
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| compound |
can be decomposed into 2 oe more simpler substances |
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| element |
cannot be decomposed by ordinary change |
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| pure substance |
same composition, canot be separated without changing substnacfe |
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| homogeneous mixture |
uniform in composition |
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| heterogeneous mixture |
not uniform throghout |
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| mixture |
blend of 2 or more kinds of matter |
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| law of conservation of energy |
energy cannot be created from one form to another; cannot be created or destroyed |
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| potential energy |
stored energy |
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| kinetic engergy |
energy of motion |
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| energy |
the ability to cause work or change |
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| endothermic reaction |
takes in heat |
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| exothermic reaction |
gives off heat |
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| chemilumiinescence |
gives off light |
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| product |
substances that are formed |
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| reactant |
substances that undergo change |
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| chemical change/ chemical reaction |
a change in which new different substances are formed |
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| chemical property |
ability of a substance to change its Identity |
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| plasma |
high temperature state in which atoms lose electrons (stars) |
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| gas |
indefinite volume, indefinite shape |
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| lquid |
definite volume, indefinite shape |
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| solid |
definite volume, definite shape |
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| change of state |
physical change fro one state to another |
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| physical change |
any change that odes not cahnge identity of substance (meltingm cutting wire, boiling) |
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| physical property |
can be observed or measure without altering identity of substance (color,weight) |
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| Intensive properties |
does NOT depend on amount of matter (melting & boiling point) |
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| extensive properties |
depends on amount of matter (volume,mass) |
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| law of conservation of mass(matter) |
matter can neither be created or destroyed in ordinary chemical reactions |
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| intertia |
resistance to change of motion |
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| matter |
anything that hass mass and takes up space |
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| mass |
measure of the amount of matter in a substance |
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| weight |
measure of the Earth's gravitational pull for matter |
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| element |
a pure substance made up of only one kind of atom |
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| atom |
smallest unit of an element that maintains the properties of it |
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| chemical |
any substance that has a specific composition
ex:CO2, sucrose, H2O |
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| technological developement |
production and use of products that improve our quality of lfe |
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| applied research |
meant to solve a problem |
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| basic research |
meant to increase knoledge |
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| theoretical chemistry |
the use of mathematics and computers ti understand the principles begind observed chemical behavior and the design and predict the properties of new compounds |
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| biochemistry |
the study of substances and processees occuring in living things |
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| analytical chemistry |
the identification of the componenet and composition of materials |
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| physical chemistry |
the study of the properties and changes of matter and their relation to energy |
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| Inorganic Chemistry |
the study of all substances not classified as organic, mainly those compounds that do not contain carbon |
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| Organic Chemistry |
the study of most carbon containing products |
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| Chemistry |
the study of composition, structure, and properties of matter and hte changes it undergoes |
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