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43 Cards in this Set

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What is chemistry?
study of matter, its properties, and changes it undergoes
What are the major branches of chemistry?
organic, inorganic, physical, analytical, biochemical
what is organic chemistry?
study of carbon containing compounds
what is inorganic chemistry?
study of noncarbon containing compounds
what is physical chemistry?
study of the properties and changes of matter and their relation to energy
what is analytical chemistry?
the ID of components and processes occuring in living things.
What is matter?
anything that has mass and takes up volume
what is mass?
the measure of amount of matter
What are the three parts of mass?
atom, element, and compound
what is an atom?
smallest unit of an element that maintains the properties of that element.
what is an element?
a pure substance made up of 1 kind of atom
what is a compound?
a substance that's made up of 2 or more elements that are chemically bonded
eg. H2O
what are properties?
are characteristics that describe matter or how it behaves
what are physical properties?
characteristics that can be observed or measured w/o changing the identity of the substance
what are two types of physical properties?
extensive and intensive
What is an extensive p.p.?
varies with amount of matter
eg. mass, vol.,area, and length
what is an intensive p.p.?
does not vary with amount of matter
eg. density, color, odor, melting(freezing) point, and solubility
what are the four things that describe physical changes?
-no new substance is formed
-dissolving sugar, cutting paper
-water freezing, grinding
-melting and boiling
melting and boiling are an important class of physical changes called________
changes of state
What are three changes of state?
solid, liquid, and gas
What is a gas to a solid?
deposition
what is a solid to a gas?
sublimation
what is a solid to a liquid?
melting
what is a liquid to a solid?
freezing
what is a gas to a liquid?
condensation
what is a liquid to a gas?
evaporation
what is a chemical property?
a substance's ability to undergo changes that transform it into different substances
What are two examples of a chemical property?
-ability of iron to rust by combining with oxygen from the air
-ability of silver to tarnsih by combinbing with sulfur
the substances that react in a chemical changes are called_______
reactants
the substances that are formed by a chemical change are called______
products
what is the formula for iron rusting?
IRON + OXYGEN= IRON OXIDE(RUST)
FE O FE2O3
what is the new substance that is formed from iron and oxygen?
IRON OXIDE(RUST)
FE2O3
What are the 5 evidences of a chemical change?
-color change
-gas produced w/o heating
-precipitate formed (solids formed from 2 aqueous solutions)
-New odor forms
-Heat or light observed
What is a mixture?
a blend of two or more types of matter, each which retains its own identity and properties
what are the two types of matter?
homogeneous and heterogeneous
what is homogeneous and some ex.?
-solutions, uniform composition
eg. AU, saltwater, gatorade, FE203
what is heterogeneous and some ex.?
region has different appearance. each phase retains its own properties, they don't react with each other.
eg. veggie soup, oil and water
what is a pure substance?
same chemical and physical properties always same composition
what is an element?
every atom is alike, cannot be decomposed into simpler atoms
What are the different types of an elements?
monatomic elements, diatomic elements, and polyatomic elements
what is a monatomic element?
do not form bonds together
what is a diatomic element?
GIVE ACRONYM
atoms bond in 2atom units
O I had better not fail chemistry!
O2, I2, Br2, N2, F2, Cl2
what is a compound?
-consists of 1 type of molecule
-each molecule is made of at least 2 different types of atoms
-its produced and decomposed only with a chemical reaction