-
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.
-
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.
-
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.
-
Humphry Davy, he ran some wires through some melted pot ash. Pure potassium began to emerge fom the battery wires.
-
Friedrich Wöhler placed two chemicals in a beaker, the chemicals produced small crystals He had made urea:an organic substance from inorganic substances.
-
August Kekule developed a system to visiaulize a chemical structure.
-
Robert Bunsen had discovered that certain elements change the color of a flame.
-
Dmitri Mendeleev discovered the periodic table when he created a series of cards with ach known element on each of the cards.
-
Henri Bacquerel conducted severel experiments to see if chemicals emitted radiation. He placed different objects on a photographic plate.
-
Joseph Thompson, he used a crooks tube in an experiment. He used a stream of cathod rays produce a stream of electricity.
-
Gilbert Louis explained that electrons and atoms went in shlls around the nucleus.
-
John Hyer, discovered the long stringy molecules of cellulose.
-
Richard Smalley, used laseers and spectroscophic matter to discover peices of carbon in space.
