Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
400 BC atomic theory |
Elements: earth, fire, water, wind |
|
|
Law of definite proportions |
Compounds have set ratios by mass for the elements in them Ex. NaCl has 39.34% Na |
|
|
Law of conservation of mass |
Mass reactants=mass products All matter stays in universe none is created or destroyed |
|
|
Law of multiple proportions |
Atoms combine in whole number ratios |
|
|
Daltons atomic theory |
1. Atoms cannot be destroyed or created. 2. Atoms of the same element are the same. 3. Atoms of different elements are different. 4. Atoms combine in whole number ratios. 5. In reactions, atoms combine, seperate, and rearrange. |
|
|
JJ thomson |
Cathode ray Negative particles Randomly spaced Plumb pudding model Electrons |
|
|
Rutherford |
Gold foil Atoms empty space Small dense nucleus Protons + Neutrons - |
|
|
Bohr planetary model |
Electrons orbit nucleus |
|
|
Cloud model or quantum mechanics |
Probability of where electrons most likely are |
