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This test is run by .
Note that your final mark will not be saved in the system.

Atoms and isotopes Reorder

Target Level

4-5

Running Total

Attempt

1 of 3

Drag and drop the boxes into the correct order.

Reorder the discoveries, models, and ideas to create a timeline of the model of the atom from the earliest (at the top) to the most recent (at the bottom).

Bohr model - electrons orbit the nucleus at specific distances
The nucleus contains neutrons
Alpha scattering experiment - evidence for the nuclear model of the atom
Plum pudding model - ball of positive charge with electrons throughout
Atoms thought to be tiny, indivisible spheres
Electron discovered
The nucleus can be divided into positive charges - proton discovered

This is your 1^st attempt! The marking algorithm gives more marks for getting the right order first time.

Pass Mark

70%