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The Element Oxygen
It was discovered by Joseph Priestly in the 1770's. This element is what mostly make up the rest of the other elements on the periodic table. -
The Atomic Theory
Dalton first discovered the atomic theory and it determined the atomic weight and the relationship between atoms. -
Electricity Transforms Chemicals
Humphry Davy performed an experiment where he melted pot ash and the put wires. Potassium was the outcome when reacting to chemicals. -
Molecules
Discovered by Avogadro, he concluded that gases are made by molecules and not just atoms. -
Synthesis of Urea
Stating that the building block of all matter of both organic and inorganic aren't different. -
Periodic Table
Elements were arranged by atomic number, electron configurations, and similar properties. -
Chemical Structure
The structure was found by August Kekule. He found out how molecules can form bonds. -
Radioactivity
Antonie Becquerel discovered how Uranium was the main source of causing radioactivity. -
Heating Atoms
To identify the elements, they use heat because not every element has the same color. -
Electron
J. J. Thomson discovered how an atom can have a negative charge, and not just a positive charge.