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ICP review of chemistry semester 2
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Compared to most substances, water is unusual because it__ when it goes from liquid to solid state.
Expands
The elements in groups 3 through 12 of the periodic table are the _ elements.
Transition
An ionic bond is formed when electrons are _ between atoms.
transferred
What is the correct formula for calcium oxide
CaO
If heat must be added to a chemical reaction, then the reaction is __
Endothermic
If a certain atom has 32 protons, 32 electrons and 34 neutrons, what is the mass number?
66
When one element replaces another element in a compound the reaction is which type?
single displacement
Most matter expands when
heated
As the volume of a gas increases, the pressure will ____ if the temperature remains constant
decrease
The particles of a solid will move the slowest and the particles that make up _____ move the fastest.
gas
The sum of the oxidation numbers in a neutral compound is always ____.
zero
Solution is another name for a ___ mixture.
homeogeneous
The __ __ are in group 18 on the periodic table
noble gases
__ can be used as a wire because they are ductile
Metals
What is an insoluble compound that forms during a chemical reaction?
precipitate
Atoms of the same element with different numbers of __ are called isotopes
neutrons
A substance that __ __ a chemical reaction is called a catalyst.
speeds up
A decomposition reaction produces two new substances with masses of 28 grams and 32 grams respectively. What was the mass of the reactant?
60 grams
An atom with 8 ____ in the outermost energy level is chemically stable
electrons
What is the correct name for the compound KCl?
potassium chloride
A chemical bond that occurs between two non metals that __ electrons is a covalent bond.
share
Graphite, diamond and the buckminster fullerene are three __ of the element carbon.
allotropes
The formation of ammonium chloride from hydrochloric acid and ammonia is an example of a ___ reaction.
synthesis
The reaction of hydrogen gas with oxygen gas to produce water can be classified as a synthesis or ___ reaction.
combustion
the amount of energy needed to change a material from a liquid to a __ is the heat of vaporization.
gas
The substance(s) on the ___ side of the arrow in a chemical equation is a reactant.
Left
Archimedes' Principle determines whether an object will sink or __
float
A period on the periodic table is a ___ row.
horizontal
A fluid's resistance to flow is __
viscosity
____ ____ is the theoretical point at which all molecular motion stops.
Absolute zero
The metal, mercury, and nonmetal, bromine, are the only two elements on the periodic table that exist at room temperature as ___
liquids
The scattering of ___ by colloids is called the Tyndall effect.
light
Boiling water is an example of a __ change
physical


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