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Exam
Ch 1
20
Chemistry
11th Grade
12/16/2007

Additional Chemistry Flashcards

 


 

Cards

Term
A compound is
Definition
a substance made of 2 or more atoms that are chemically bonded that can be broken down into simpler stable substances
Term
What happens to the energy in a substance when it changes state?
Definition
it changes form but is neither destroyed nor increased
Term
A homogeneous mixture is also
Definition
a solution
Term
A physical change occurs when a
Definition
glue gun melts a glue stick
Term
the liquid state of matter can be described as
Definition

having a definite volume but not a definite shape

Term
noble gases are in Group 18 and are bes known b/c they are
Definition
unreactive
Term
Plasma is the 4th state of matter in plasma state
Definition
atoms lose electrons
Term
A state of matter in which a material has no definite shape but has a definite volume is the
Definition
liquid state
Term
If a mixture is not uniform throughout it is called
Definition
heterogeneous
Term
a chemical change occurs when
Definition
a leaf changes color in fall
Term
which of the followning is an intensive property of matter
Definition
density
Term
A solid substance is
Definition
always the same shape regardless of its container
Term
A nonmetal is usually
Definition
brittle
Term
what is an extensive property of matter
Definition

volume

Term
It is easy to determine whether a substance is a metal if the substance is
Definition
a good electrical and heat conductor
Term
Under ordinary conditions of temp. and pressure the particles in a gas are
Definition
very far from one another
Term
a mixture is
Definition
a blend of any 2 or more kinds of matter, as long as each maintains its own unique properties
Term
Which of the following is an example of a heterogeneous mixture?
Definition

granite

Term
Metalloids are often
Definition
semiconductors
Term
if a mixture is in uniform composition it is said to be
Definition
 homogeneous
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