History of the Atom
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| John Dalton | Believed atoms were fundamental particles. (nothing smaller than them)
Indivisible.
Can't be created or destroyed.
🗑
|
||||
| Law of Conservation of Mass. | Matter is neither created or destroyed in the course of a chemical reaction.
🗑
|
||||
| Crookes | Cathode rays. (negative plate)
Discharge tube, low pressure.
Electricity passed through the tube, producing invisible rays travelling in straight lines from the cathode to the anode.
🗑
|
||||
| Cathode rays are.. | ..streams of negatively charged particles called electrons.
🗑
|
||||
| JJ. Thomson | Electron.
Neg. and pos. plates. Cathode rays.
Beam struck a fluorecent screen.
Plum pudding model.
🗑
|
||||
| Milikan | Determined the charge and mass of an electron using charged oil droplets.
🗑
|
||||
| Plum pudding model. | Pictured the atom as a sphere, which is positively charged and has the negatively charged electrons embedded in it.
🗑
|
||||
| Rutherford | Gold foil and alpha particle experiment.
Discovered the nucleus.
Discovered protons..alpha particles ejected positive particles from oxygen and nitrogen atoms.
🗑
|
||||
| Chadwick | Discovered neutrons..alpha particles ejected neutral particles from beryllium.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
MitchO'N
Popular Chemistry sets