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The radioactive decay of uranium was first discovered by Antoine Henri Becquerel in 1896. The Paris physician accidentally discovered that photographic plates wrapped in dark paper were blackened by invisible radiation was capable of discharging an electroscope. In 1898, a France couple, Marie and Pierre Curie, discovered the radioactive elements radium and polonium. Marie Curie also discovered the radioactive element thorium..

4

Here’s a quick and easy way to remember the seven diatomic molecules.

5

This is an experiment testing how high amounts of ethylene gas affects the ripening of bananas.

0

Diffusion and how it affects different solutes and solvents. The iodine is what should be diffusing into the other elements. When it has sat for at least twenty-four hours then the solution will be completely diffused.