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Atomic Theory Review
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In Greek, what does atom mean?
indivisible
State 3 points of Dalton's theory
1. All matter is made of atoms
2. Same # atom = same element
diffrent # of atom = diffrent element
3.Atoms cannot be created nor destroied but can be combined, rearranged, or seperated
William Crooks invented
Cathorde Ray tube
Who invented the cathorode ray tube?
William Crooks
Early philosophers said that world was made of...
Water
Fire
Earth
Air
JJ Thompson discovered...
electrons
Robert Millikan discovered...
electron charge
How did Robert Millikan discover the charge of the electron?
Oil drop experiment
Rutherford's experiment was named...
Gold-foil experiment
What 2 things did Rutherford discover?
Small dense nucleus and the rest is empty space
Chadwick discovered...
Neutron
Atomic number tells what?
Number of protons and identifies the atom
Mass minus Atomic number = ?
neutrons
How do you get neutrons?
mass minus atomic #
Demos-215 exists 24.5%
Demos-220 exists 75.5%
What is the average mass?
215amu to 220amu
Cesium-134 symbol, atomic number, mass, protons, neutrons, and electrons
134/55 Cs, 55, 134, 55, 79, 55
What are the coloumns of the periodic table called?
Families
What are the rows of the periodic table called?
Periods
Author
moocenary
ID
40560
Card Set
Atomic Theory Review
Description
Atoms are tiny!
Updated
2010-10-08T00:01:51Z
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