Study Chemistry Chapter 3 Flash Cards

 
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Chemistry Chapter 3

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Average Atomic Mass
weighted average of the atomic masses for all known isotopes
Atomic Mass unit
AMU mass of a proton or neutron
Nuclear Symbol Notation
Mass # over Atomic # Element symbol
Hyphen Notation
Name-Mass#
Isoptopes of H
Protieum, Deuterium, Titium
Tritium
one proton, 2 neutrons, one election
Deuterium
one proton, one neutron, one electron
Protium
one proton only
Mass Number
total of protons & neutrons
Nuclide
general term for any isotope of an element
Isotope
atoms of hte same element with varying neutrions
Atomic Number
number of protons in the nucleus
Forces in the nucleus
Nuclear Forces
forces that hold nuclear particles together
Ernest Rutherford
discovered nucleus with the gold foil experiment
JJ Thomson
discovered electron with Cathode-Ray Tube
Cathode-Ray Tube
vacuum tube containing electron gun
Modern Attomic Theory
all matter is composed of atoms
atoms of one element differ in properties from atoms of another element
Law of Multiple proportions
If two or more compoueds are composed of the smae 2 elements the masses can be expressed as ratios of small whole numbers
Law of Definite proportions(Law of Def. Composition)
chemcal compounds contains the same elements in exactly the same proportions by mass regardless of size
Law of Conservation Mass
mass is neither created or destroyed in ordinary chemical rxns
Chemical Reaction
transformation of substances into 1 or more new substances
Aristotle/Plato
disagreed with Democrotus theory
Democritus
said an atom cannot be divided anymore
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