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Oxygen
Joseph Priestley discovers oxygen. He takes a lens and focuses it on an orange mercury powder. It then changes into a metal and a gas is released. -
Atomic Theory
John Dalton first discovers this theory by doing experiments that showed oxygen, hydrogen, and carbon combined indefinite proportions. He became convincced that these elements were made up of small pieces now known as atoms. -
Atoms combine into molecules
Joseph Gay-Lussac conducted experiments where he combined different gases and these gases produced an even bigger volume. Amadeo Avagadro soon discoverd what the atoms in these gases had produced. -
Electricity transforms chemicals
Humphry Davy, he ran some wires through some melted pot ash. Pure potassium began to emerge fom the battery wires. -
Synthesis of Urea
Friedrich Wöhler placed two chemicals in a beaker, the chemicals produced small crystals He had made urea:an organic substance from inorganic substances. -
Chemical Structure
August Kekule developed a system to visiaulize a chemical structure. -
Atoms have signatures of light
Robert Bunsen had discovered that certain elements change the color of a flame. -
Periodic Table
Dmitri Mendeleev discovered the periodic table when he created a series of cards with ach known element on each of the cards. -
Radioactivity
Henri Bacquerel conducted severel experiments to see if chemicals emitted radiation. He placed different objects on a photographic plate. -
The Electron
Joseph Thompson, he used a crooks tube in an experiment. He used a stream of cathod rays produce a stream of electricity. -
Electrons form chemical bonds
Gilbert Louis explained that electrons and atoms went in shlls around the nucleus. -
Plastics
John Hyer, discovered the long stringy molecules of cellulose. -
Fullerenes
Richard Smalley, used laseers and spectroscophic matter to discover peices of carbon in space.
