Exam 1

Matter
“stuff” anything that has mass and occupies space
Pure substances
only a single type of matter is present
Mixtures
two or more pure substances are intermingled with eachother
Homogeneous mixtures/solution & what is an example?
composition of mixture is identical throughout. Ex: sugared tea, air.
Heterogenous mixture & an example of it
composition is not the same throughout. Ex: mixture of table salt and sugar, granite
Elements
basic building blocks of matter
How many elements are there?
118
Elemental substance & an example
made from atoms of just one element. ex: pure gold
Atom
the smallest possible piece of an element
Compound
pure substances made from atoms of two or more different elements. ex: water
Chemical formula
indicates the number of atoms of each element that make up the smallest possible piece of that compound.
Physical transformation
one that leaves it as the same substance but in a different physical state
What are the states of matter?
solid, liquid, gas
Vaporization
the change from liquid to vapor
Condensation
the change from vapor to liquid
sublimation
from solid to gas
x

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