Atomic Theory Review
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In Greek, what does atom mean?
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?
Early philosophers said that world was made of...
JJ Thompson discovered...
Robert Millikan discovered...
How did Robert Millikan discover the charge of the electron?
Oil drop experiment
Rutherford's experiment was named...
What 2 things did Rutherford discover?
Small dense nucleus and the rest is empty space
Atomic number tells what?
Number of protons and identifies the atom
Mass minus Atomic number = ?
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?
What are the rows of the periodic table called?
What would you like to do?
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