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70 Cards in this Set
- Front
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kinetic molecular theory
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this theory states that all matter is made up of tiny basic units of structure called atoms
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Democritus 5th bc
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wrote that mater was empty space filled with tremendous numbers of tiny indivisible particles called atoms called the particle model
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During any type of chemical or physical change atoms are
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neither created nor destroyed during any type of chemical or physical change
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kinetic molecular theory
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this theory states that all matter is made up of tiny basic units of structure called atoms
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chemical elements are
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similar groups of atoms that make up pure substances
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Democritus 5th bc
|
wrote that mater was empty space filled with tremendous numbers of tiny indivisible particles called atoms called the particle model
|
|
kinetic molecular theory
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this theory states that all matter is made up of tiny basic units of structure called atoms
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pure substances each element has its own kind of atom some of these are
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hydrogen, oxygen, carbon, iron, gold are chemical elements with their own groups of atoms
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During any type of chemical or physical change atoms are
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neither created nor destroyed during any type of chemical or physical change
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Democritus 5th bc
|
wrote that mater was empty space filled with tremendous numbers of tiny indivisible particles called atoms called the particle model
|
|
chemical elements are
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similar groups of atoms that make up pure substances
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pure substances each element has its own kind of atom some of these are
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hydrogen, oxygen, carbon, iron, gold are chemical elements with their own groups of atoms
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During any type of chemical or physical change atoms are
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neither created nor destroyed during any type of chemical or physical change
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chemical elements are
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similar groups of atoms that make up pure substances
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pure substances each element has its own kind of atom some of these are
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hydrogen, oxygen, carbon, iron, gold are chemical elements with their own groups of atoms
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Democritus
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5th century bc philisoper from Greece earliest record of atom
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Particle Matter developed by Democritus and helped along by Galileo and Newton described as
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matter being composed of tiny particles or atoms did not gain acceptance until the late 1700 or 1800's.....
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kinetic molecular theory
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all matter is made up of tiny basic units of structure called atoms
|
|
Atoms are neither
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divided created nor destroyed during any type of chemical or physical change
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chemical elements are
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similar groups of atoms that make up pure substances
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hydrogen oxygen carbon iron and gold are
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chemical elements and each has its own atom
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in addition to the chemical elements are are pure substances called
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compounds
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compounds have
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more complex units of structure
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hydrogen oxygen carbon iron and gold are
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chemical elements and each has its own atom
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hydrogen oxygen carbon iron and gold are
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chemical elements and each has its own atom
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water, sugar alcohol
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are composed of atoms of two or more elements that join together in definite proportions
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in addition to the chemical elements are are pure substances called
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compounds
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molecule
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defined as a tightly bound group of atoms in which the atoms maintain their identity
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Democritus
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5th century bc philisoper from Greece earliest record of atom
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compounds have
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more complex units of structure
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in addition to the chemical elements are are pure substances called
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compounds
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water, sugar alcohol
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are composed of atoms of two or more elements that join together in definite proportions
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Particle Matter developed by Democritus and helped along by Galileo and Newton described as
|
matter being composed of tiny particles or atoms did not gain acceptance until the late 1700 or 1800's.....
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molecule
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defined as a tightly bound group of atoms in which the atoms maintain their identity
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compounds have
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more complex units of structure
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kinetic molecular theory
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all matter is made up of tiny basic units of structure called atoms
|
|
water, sugar alcohol
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are composed of atoms of two or more elements that join together in definite proportions
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Atoms are neither
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divided created nor destroyed during any type of chemical or physical change
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molecule
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defined as a tightly bound group of atoms in which the atoms maintain their identity
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chemical elements are
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similar groups of atoms that make up pure substances
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all elements are
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gases at high temperatures
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some elements exist as
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gases at ordinary temperatures
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at ordinary tempetatures
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atoms of oxygen nitrogen and other gases are paired in groups of two to form diatomic molecules
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helium and other gases
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exist as single unpaired atoms at ordinary temperatures
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VERY HIGH TEMPS
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iron gold nd other metals vaporize to form gaseous single unpaired atoms
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in the kinetic molecular theory the term molecule has the additional meaning of the
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smallest ultimate particle of matter that can exist.
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single atom of helium is known as a
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monatomic molecule
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molecule is defined as the smallest particle of a compound or
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a gaseous element that can exist and still retain the characteristic popertties of that substance
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cohesion
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attractive force is between the same kind of molecues
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without cohesion
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all matter would be in the form of gases
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attractive force between unlike molecules is called
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adhesion
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solids liquids and gas are
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three phases of matter common on earth under conditions of ordinary temperature and ressure
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different chara of each phase can be attributed to the
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molecular arrangments and the strength of attraction between the molecules
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solids
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molcules that are fixed distances apart and bound by relatively strong cohesive forces
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molecules in a solid
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are a nearly fixed distance from the next but will vibrate and move around an equilibrium position
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liquids have molecules that are not confined to
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an equilibrium position as in a solid.
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molecules of a liquid
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are close together and bound by cohesive forces that are not as strong as ini a solid. they flow
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gases are composed of
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molecules with weak cohesive forces acting between them; far apart move freely in constant motion no fixed shape nor fixed volumes
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Gases nade up of positive ions and negative electrons are called
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Plasmas
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Plasmas have the same properties as gases but conduct
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electricity and interact stronly with magnetic fields
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vapor
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describes a gas that is usually in the liquid phase
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water vapor
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describes a gas that is usually in the liguid phase
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fluids describe
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liquids and gases collectively because of their ability to flow
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plasma physics attempts
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to produce controlled nuclear fusion
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diffuse
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spread
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Rudolf Clausius showed that the temperature of a gas is
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proportional to the average kinetic energy of the gas molecules
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Explains why gases diffuse at a greater rate
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at high temperatures
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kinetic energy involves the mass of the molecules as well as their velocity
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(KE = 1/2 mv2)
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temperature of a substance is a measure of the average
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kinetic energy of the molecules making up the substance
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bimetallic strip
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strip will bend toward the metal with less expansion
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